{"id":163727,"date":"2021-08-04T11:10:47","date_gmt":"2021-08-04T03:10:47","guid":{"rendered":"http:\/\/facfox.com\/docs\/?post_type=kb&#038;p=163727"},"modified":"2021-08-03T15:00:40","modified_gmt":"2021-08-03T07:00:40","slug":"how-to-prime-and-paint-3d-printed-parts","status":"publish","type":"kb","link":"https:\/\/facfox.com\/docs\/kb\/how-to-prime-and-paint-3d-printed-parts","title":{"rendered":"How to Prime and Paint 3D Printed Parts"},"content":{"rendered":"<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/img.facfox.com\/imgs\/2021\/07\/746ca85ee05364e6.png\" \/><\/p>\n<p>Spray paint has an image problem. Most often seen on graffiti, dripping utility signs, and patch jobs on rusty cars, designers often use it for quick coverage and a flat surface instead of detailed, artistic effects. But with the right technique, spray paint creates smooth surfaces and deep color gradients.<\/p>\n<p>If you\u2019re an industrial designer, digital artist, character designer, or model builder, this guide is for you. You\u2019ll learn how to achieve a glossy, smooth finish similar to a car surface\u2014transforming your part from a simple 3D print to a final product ready to display, using any desktop <a href=\"https:\/\/formlabs.com\/3d-printers\/\" target=\"_self\" rel=\"noopener\">3D printer<\/a>.<\/p>\n<h2 id=\"How%20to%20Paint%203D%20Printed%20Parts\" class=\"Header_headertext__3bV7v Header_as-h2__3ueGZ Header_weight-600__2gG0d\">How to Paint 3D Printed Parts<\/h2>\n<p><iframe title=\"The Ultimate Guide to Painting 3D Printed Parts - Step 1: Priming\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/-MHFd4jNrVA?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>One step in the finishing process is the key to turning 3D printed objects into a professional product. Most beginners skip it, but all experienced model builders do it. It makes painting effortless and helps create a flawless final surface. This one step is priming.<\/p>\n<p>Adding a final coat of paint to a part creates presence and polish. But anyone who builds 3D printed models for a living knows that paint hides no flaws. Without treatment, small step-marks or support marks will show through on the final surface, along with any large triangles visible in the 3D printed mesh. Depending on the 3D printing process you used, there might also be clearly visible layer lines. If the end goal is to create a show-stopping object, then primer is essential.<\/p>\n<p><em>The first integrated color mixing solution for resin 3D printers, <a href=\"https:\/\/formlabs.com\/materials\/standard\/#color-kit\" target=\"_self\" rel=\"noopener\">Color Kit<\/a> enables SLA 3D printing in a range of colors without the manual work of finishing and painting. Try Color Kit to field test product concepts more quickly with high resolution 3D prints that fit their environment.<\/em><\/p>\n<p>The goal of priming is to create a pristine print surface before painting. The neutral gray of a primer highlights imperfections in a model and preps them to be sanded or filled with modeling putty. It makes the painting process much cleaner and the outcome more professional (especially with glossy surfaces).<\/p>\n<p>Prior to priming, the surface should be smooth. While primer will fill in very small cracks and holes, using a thin coat of paint will retain surface details.<\/p>\n<p>For SLA 3D printers, this involves removing the support structures and sanding down the support marks. For FDM printers, when painting PLA or ABS 3D prints with large layer heights, sanding the entire model might be necessary before painting to make sure that that the layer lines aren&#8217;t visible. A heavy primer can be used as an alternative to sanding, but this might obscure any intricate details in your part.<\/p>\n<p>After sanding and adding an initial coat of primer, inspect the surface again for imperfections. Most primers have an extremely flat finish that highlights intricate details under direct light. Apply a final coat of primer and after the manufacturer specified drying time, the part is ready for painting (a quick, final polish is not a bad idea).<\/p>\n<p><iframe title=\"The Ultimate Guide to Painting 3D Printed Parts - Step 2: Painting\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/zFAhhpXp4tg?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>After priming, spray painting 3D printed models is a surprisingly quick process (with the right technique). For a glossy finish, you must build up thin layers of even paint in multiple coats over a pretreated surface. Thin coats allow under painted layers to show through, creating a rich, deep color. To spray thin coats, hold the paint can nozzle very close to the model and move quickly. Rotate the model to keep coats even.<\/p>\n<p>Between paint coats, remember to buff and polish the paint surface. This maintains a smooth surface that will look glossy under the final clearcoat.<\/p>\n<p>To get the richest color, add an undercoat or base layer. An undercoat is a colored paint that blocks the neutral color of the primer. Generally, it takes 2 to 3 thin layers to fully cover a surface. Black is a popular undercoat for darker tones, while white is ideal for light colors.<\/p>\n<p>Between layers, masking preserves details in a particular color. Don\u2019t leave general purpose masking tape on for more than a few days. Paint manufacturer Tamiya recommends that you complete spray painting in a single session.<\/p>\n<p>After masking, the topcoats add the final color. Imagine these layers as a light glaze over the undercoat. The thinner the topcoat, the more the undercoat shows through. Between applications, let the paint sit for a few minutes to see if the color is saturated enough.<\/p>\n<p>When you\u2019re satisfied with the color, it\u2019s time to move on to clear coating. Apply the clearcoat in 1 or 2 thin, even layers. With a polished surface, you want just enough to let all the microdrops of clearcoat run together, forming a glossy shell over the part. While not necessary, you can polish the surface with an ultrafine grit polishing cloth or wax with carnauba polish to add an extra layer of protection.<\/p>\n<p>After painting, give the model time to dry. There\u2019s no hard and fast rule, but letting the model rest for at least a week will allow the paint to thoroughly harden. If you need to move the model before then, wear gloves and use a delicate touch to avoid damage.<\/p>\n<div class=\"\">\n<h2 id=\"Step%20by%20Step%3A%20Priming%203D%20Printed%20Parts\" class=\"Header_headertext__3bV7v Header_as-h2__3ueGZ Header_weight-600__2gG0d\">Step by Step: Priming 3D Printed Parts<\/h2>\n<\/div>\n<div class=\"\">\n<h3 id=\"Materials\" class=\"Header_headertext__3bV7v Header_as-h3__282sZ Header_weight-600__2gG0d\">Materials<\/h3>\n<figure style=\"width: 1280px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/img.facfox.com\/imgs\/2021\/07\/fae12b42d33d584b.png\" alt=\"\" width=\"1280\" height=\"720\" \/><figcaption class=\"wp-caption-text\">These tools of the trade will help make priming your part simple.<\/figcaption><\/figure>\n<\/div>\n<div id=\"materials-needed\" class=\"section-665749 Grid_section__1cbIK\">\n<div id=\"\" class=\"section-1507671 Grid_section__1cbIK\">\n<div class=\"text-plugin\">\n<p><strong>Primer<\/strong><\/p>\n<p>Primer is a special type of paint that adheres strongly to the part and provides a uniform surface for paint to bond with. Different primers have different uses. A spray-on primer is the best way to paint your printed parts because it quickly covers a surface with an even coating. Brush-on primers are available, but they are tricky to work with and better for fine touch ups. For best results, choose a primer and paint that are plastic compatible and from the same brand. We like Krylon and Montana (though both are thick formulas), but nothing really compares to Tamiya brand model paint &#8211; it goes on extremely thinly and evenly, preserving delicate surface details.<\/p>\n<p><strong>Rotary Tool<\/strong><\/p>\n<p>Because sometimes you want to sand fast. With interchangeable bits, rotary tools offer a variety of options for sanding and polishing parts. Drum sanding bits quickly sand down supports, while steel wire brushes smooth surface marks. Rotary tools are rough, so you will still need sandpaper for a smooth finish. There are plenty of great brands: Dremel and Craftsman are popular in the states, Proxxon in Europe. To avoid scorching your part, turn down the RPMs to the minimum (usually 500-1000) and use a light touch.<\/p>\n<p><strong>Hand Files<\/strong><\/p>\n<p>Not as clumsy or as random as a palm sander. A more elegant tool\u2026for a more civilized age.<\/p>\n<p>One of the most simple yet effective tools, a hand file removes supports and sands down surfaces. Using a firm grip, you can remove marks with more control than with a rotary tool. Keep a wire brush on hand and clean the file\u2019s teeth often (otherwise plastic and resin will gum up teel). Like a rotary tool, a hand file will leave a rough surface, so it\u2019s best for removing the larger support marks.<\/p>\n<p><strong>Sand Paper<\/strong><\/p>\n<p>The most unglamourous tool in the shop, sandpaper has come light years in the last decade with the release of flexible sanding sheets. Available at home improvement stores, flexible sanding sheets last 15 times longer than paper ones. They don\u2019t curl, puncture or crease.., and they hey can be used wet, which reduces dust and prevents buildup in the sanding tooth. Because they flex, they can easily reach small interior spaces and rounded surfaces.<\/p>\n<p><strong>Dust Removal<\/strong><\/p>\n<p>Even after wet sanding, some dust will remain. Remove buildup with water and a soft scrub brush (an old toothbrush works). For serious cleanup, an inexpensive sonicator can quickly remove fine particles caught in corners and cracks of a surface. If you work in an area with hard water, using deionized or distilled water will prevent spotting between painting.<\/p>\n<p><strong>Tack Cloth<\/strong><\/p>\n<p>Tack cloth is a soft, slightly sticky cotton cloth designed to remove remaining dust and leave a clean surface for painting. Let your model dry before using the tack cloth \u2014 the waxy surface does not work well with water.<\/p>\n<p><strong>Painting Block, Dowels &amp; Drill<\/strong><\/p>\n<p>This simple trick will save you grief in the spray booth (we were excited when we saw this technique in a modelmaking how-to video by Adam Savage). By mounting your 3D print on a dowel (often you can use a preexisting hole in the part), you can quickly maneuver while spraying, allowing you to get to all sides and into the nooks and crannies of the part without creating any fingerprints. When you want to add an even coat to all sides of your model, this is pretty essential. We recommend ordering a variety of size of dowels. To minimize the hole size on a part, start with a small size and work your way up until the model feels firmly seated. Drill a corresponding hole in a block of wood or MDF and insert the part with the dowel &#8211; now you can keep the model hands free while spraying.<\/p>\n<p><strong>Safety Equipment<\/strong><\/p>\n<p>Spraypainting means working with airborne particulates and solvents, both of which pose health hazards. Remember to use a NIOSH approved respirator and work in a well ventilated workspace. While painting, wear nitrile gloves to avoid spraying paint on your hands and and also protect your model from fingerprints.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"tools\" class=\"section-665753 Grid_section__1cbIK\">\n<div id=\"\" class=\"section-1507682 Grid_section__1cbIK\">\n<div class=\"\">\n<h3 id=\"Tool%20Checklist\" class=\"Header_headertext__3bV7v Header_as-h3__282sZ Header_weight-600__2gG0d\">Tool Checklist<\/h3>\n<\/div>\n<div class=\"text-plugin\">\n<ul>\n<li><a href=\"https:\/\/www.megahobby.com\/finesurfaceprimerlightgrayspraytamiya.aspx\" target=\"\u201c_blank&quot;\" rel=\"nofollow noopener\">Tamiya primer<\/a><\/li>\n<li><a href=\"https:\/\/www.amazon.com\/Dremel-7700-1-15-MultiPro-7-2-Volt\/dp\/B002BACCDA\/ref=sr_1_1\" target=\"\u201c_blank&quot;\" rel=\"nofollow noopener\">Rotary tool<\/a><\/li>\n<li><a href=\"https:\/\/www.amazon.com\/TEKTON-66631-8-Inch-File-5-Piece\/dp\/B0038MF2FA\/ref=sr_1_1\" target=\"\u201c_blank&quot;\" rel=\"nofollow noopener\">Hand files<\/a><\/li>\n<li>Sandpaper or <a href=\"https:\/\/www.amazon.com\/3M-28320SB-UF4-4PK-320G-Sandpaper\/dp\/B00PPD1CYA\/ref=sr_1_3\" target=\"\u201c_blank&quot;\" rel=\"nofollow noopener\">flexible sanding strips<\/a> (220\/320, 400\/600 grit)<\/li>\n<li>Water<\/li>\n<li>Soft brush with fine bristles<\/li>\n<li><a href=\"https:\/\/www.amazon.com\/3M-03192-Purpose-Tack-Cloth\/dp\/B00144GN3Y\/ref=sr_1_1\" target=\"\u201c_blank&quot;\" rel=\"nofollow noopener\">Tack cloth<\/a><\/li>\n<li>Wood painting block (sized slightly larger than model)<\/li>\n<li>Drill and drill bit<\/li>\n<li>Dowels to hold model<\/li>\n<li>Safety Equipment: <a href=\"https:\/\/www.amazon.com\/Infi-touch-Nitrile-Gloves-Hypoallergenic-Thickness\/dp\/B00S8W7HN0\/ref=sr_1_1\" target=\"\u201c_blank&quot;\" rel=\"nofollow noopener\">gloves<\/a> and <a href=\"https:\/\/www.amazon.com\/3M-Paint-Project-Respirator-Medium\/dp\/B00004Z4EB\/ref=sr_1_1\" target=\"\u201c_blank&quot;\" rel=\"nofollow noopener\">mask<\/a><\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"step\" class=\"section-665756 Grid_section__1cbIK\">\n<div id=\"\" class=\"section-1507687 Grid_section__1cbIK\">\n<div class=\"\">\n<h3 id=\"Priming%20Steps\" class=\"Header_headertext__3bV7v Header_as-h3__282sZ Header_weight-600__2gG0d\">Priming Steps<\/h3>\n<\/div>\n<div class=\"text-plugin\">\n<p><strong>1. Remove supports from your part<\/strong><br \/>\nUse a set of flush cutters to remove sections, or peel off supports by hand. With delicate pieces, an exacto knife or razor blade can be carefully used to cut away support tips.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/img.facfox.com\/imgs\/2021\/07\/11bc4818b2183e5f.png\" \/><\/p>\n<p><strong>2. Sand down support marks.<\/strong><br \/>\nUsing a rotary tool, hand file, or even 220 grit fine sandpaper, gently remove support marks from the model.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/img.facfox.com\/imgs\/2021\/07\/cc3852229c5026b8.png\" \/><\/p>\n<p><strong>3. Sand and smooth surface.<\/strong><br \/>\nThe degree to which the surface is smoothed in this step will impact the finish of the final part. Beginning with 220 or 320 grit sandpaper or flexible sanding strips, gently sand the entire surface of the model to remove any filing or tooling marks. Follow up with 400 or 600 grit.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/img.facfox.com\/imgs\/2021\/07\/57f3d67933ba4793.png\" \/><\/p>\n<p><strong>4. Mount the part.<\/strong><br \/>\nDrill a starter hole in an inconspicuous spot and mount your part on a thin dowel, then insert the dowel into the paint block.<\/p>\n<p><img decoding=\"async\" class=\"size-full wp-image-163737 aligncenter\" src=\"https:\/\/facfox.com\/docs\/wp-content\/uploads\/2021\/08\/image-8.jpg\" alt=\"\" width=\"1280\" height=\"720\" \/><\/p>\n<p><strong>5. Wash the surface to remove dust.<\/strong><br \/>\nUse a brush and water to wash away any dust. You may prefer to use deionized or distilled water (available from a grocery store) to thoroughly clean the surface without leaving any spots.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<p><img decoding=\"async\" class=\"size-full wp-image-163738 aligncenter\" src=\"https:\/\/facfox.com\/docs\/wp-content\/uploads\/2021\/08\/image-9.jpg\" alt=\"\" width=\"1280\" height=\"720\" \/><\/p>\n<p><strong>6. Wipe down the surface with a tack cloth.<\/strong><br \/>\nWhile wearing nitrile gloves, gently run the tack cloth over the surface of the model using long, gentle strokes. Try to use a continuous direction, but don\u2019t forget to wipe in the small cracks in the model.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-163739 aligncenter\" src=\"https:\/\/facfox.com\/docs\/wp-content\/uploads\/2021\/08\/image-10.jpg\" alt=\"\" width=\"1280\" height=\"720\" \/><\/p>\n<p><strong>7. Mix the primer.<\/strong><br \/>\nGently swirl the spray primer for 2 to 3 minutes in a circular motion. Avoid shaking as this can mix the propellant into the solvent, resulting in bubbles in the coat when sprayed. The goal is to fully dissolve the pigment within the solvent. After a minute of swirling, you should hear the mixing ball (called the \u201cpea\u201d) smoothly rolling around the inside of the can, indicating all the paint has mixed in.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-163740 aligncenter\" src=\"https:\/\/facfox.com\/docs\/wp-content\/uploads\/2021\/08\/image-11.jpg\" alt=\"\" width=\"1280\" height=\"720\" \/><\/p>\n<p><strong>8. Spray the first coat of primer.<\/strong><br \/>\nSpray in short, rapid strokes, 6-8\u201d from the part. Start each stroke before the part and end the stroke after the part. Moving quickly, rotate the part while spraying, Avoid allowing spray to pool on the part &#8211; it\u2019s better to start with a very thin base coat and slowly build up opacity.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-163741 aligncenter\" src=\"https:\/\/facfox.com\/docs\/wp-content\/uploads\/2021\/08\/image-12.jpg\" alt=\"\" width=\"1280\" height=\"720\" \/><\/p>\n<p><strong>9. Inspect the first coat.<\/strong><br \/>\nWith the primer on, inspect for any areas that need additional sanding or filing. If necessary, rework and polish the part with fine (&gt;600 grit) sandpaper. If sanding is necessary, be sure to repeat steps 5-6 to clean off dust before respraying.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-163742 aligncenter\" src=\"https:\/\/facfox.com\/docs\/wp-content\/uploads\/2021\/08\/image-13.jpg\" alt=\"\" width=\"1280\" height=\"720\" \/><\/p>\n<p><strong>10. Spray the final coat of primer.<\/strong><br \/>\nAdd another coat of paint using rapid strokes, making sure to keep the coat light and finish as soon as the color is opaque. Too much paint here will fill in your fine details, so make sure to avoid the tendency to add too thick of a coat.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-163743 aligncenter\" src=\"https:\/\/facfox.com\/docs\/wp-content\/uploads\/2021\/08\/image-14.jpg\" alt=\"\" width=\"1280\" height=\"720\" \/><\/p>\n<div id=\"step\" class=\"section-665756 Grid_section__1cbIK\">\n<div id=\"\" class=\"section-1507687 Grid_section__1cbIK\">\n<div class=\"text-plugin\">\n<p>With the final coat added, you\u2019re ready to move on to spray painting your part! In the next installment of this guide, we\u2019ll go over how to add a model-smooth paint job and finish with a clear coat to protect the paint job.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"painting\" class=\"section-1062868 Grid_section__1cbIK\">\n<div id=\"\" class=\"section-1507821 Grid_section__1cbIK\">\n<div class=\"\">\n<h2 id=\"Step%20by%20Step%3A%20Painting%203D%20Printed%20Parts\" class=\"Header_headertext__3bV7v Header_as-h2__3ueGZ Header_weight-600__2gG0d\">Step by Step: Painting 3D Printed Parts<\/h2>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"painting-materials\" class=\"section-1062831 Grid_section__1cbIK\">\n<div id=\"\" class=\"section-1507740 Grid_section__1cbIK\">\n<div class=\"\">\n<h3 id=\"Materials\" class=\"Header_headertext__3bV7v Header_as-h3__282sZ Header_weight-600__2gG0d\">Materials<\/h3>\n<\/div>\n<\/div>\n<\/div>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-163744 aligncenter\" src=\"https:\/\/facfox.com\/docs\/wp-content\/uploads\/2021\/08\/image-15.jpg\" alt=\"\" width=\"1280\" height=\"720\" \/><\/p>\n<div id=\"painting-materials\" class=\"section-1062831 Grid_section__1cbIK\">\n<div id=\"\" class=\"section-1507740 Grid_section__1cbIK\">\n<div class=\"text-plugin\">\n<p><strong>Paint<\/strong><\/p>\n<p>Choose thin paint that\u2019s easy to control. Hardware store paint (or even fine art paints designed for rough surfaces) are the opposite of what you want. They tend to clump and form thick, rough layers. This is because they\u2019re designed for quick, single use application. For the best detail, we recommend Tamiya spray paints. They offer a wide range of colors, including opalescent and glitter effects. The paints go on thin and provide great coverage. Tamiya paint is available on <a href=\"https:\/\/www.amazon.com\/s\/ref=sr_nr_p_89_1?fst=as%3Aoff&amp;rh=i%3Aaps%2Ck%3Atamiya+spray+paint%2Cp_89%3ATamiya%7CTamiya+Paints&amp;keywords=tamiya+spray+paint&amp;ie=UTF8&amp;qid=1453997453&amp;rnid=2528832011\" target=\"\u201c_blank\" rel=\"nofollow noopener\">Amazon<\/a> and <a href=\"https:\/\/www.megahobby.com\/tamiyats-colorsspraycans.aspx\" target=\"\u201c_blank\" rel=\"nofollow noopener\">specialty hobby shops<\/a>. The TS line of synthetic lacquers works well on Formlabs resin and lets you transition to clearcoat or even hand-painted acrylic.<\/p>\n<p><strong>Buffing Sticks<\/strong><\/p>\n<p>Nail buffing sticks apply a polished finish on a primed and sanded part. Look for them in any drug store. Make sure you get the kind that come in a 3 stage system\u2014skip the heaviest grit and move straight to the buffing and polishing sticks.<\/p>\n<p><strong>Fiber Backed Polishing Paper<\/strong><\/p>\n<p>A recent innovation, polishing paper comes in grits much like sandpaper, but it&#8217;s much finer. The fiber backing lets you bend and flex the surface, while the fine grit is perfect for polishing topcoats and clearcoats.<\/p>\n<p><strong>Tack Cloth<\/strong><\/p>\n<p>Tack cloth is a cotton cloth with a waxy coating that removes dust and hair from a surface before painting. With a folded cloth, use long, gentle strokes on the surface, moving in a single direction.<\/p>\n<p><strong>Masking Tape<\/strong><\/p>\n<p>For most single-session paint jobs, standard blue painter&#8217;s tape works best. Make sure to secure the edges by running a plastic part like a credit card over them to keep any paint from seeping underneath.<\/p>\n<p><strong>Clearcoat<\/strong><\/p>\n<p>While clearcoat won\u2019t fix a poorly primed surface, it will help even out some surface imperfections and give you a choice of gloss or matte finishes. Using a Tamiya clearcoat will guarantee compatibility with your paint layers. If you\u2019re working with another spray paint, check with the manufacturer for clearcoat recommendations.<\/p>\n<p><strong>Safety Equipment<\/strong><\/p>\n<p>Spray painting means working with airborne particulates and solvents that pose health hazards. Remember to use a NIOSH approved respirator and work in a well-ventilated workspace. While painting, wear nitrile gloves to prevent spray paint on your hands (and model).<\/p>\n<\/div>\n<\/div>\n<div id=\"\" class=\"section-1507748 Grid_section__1cbIK\">\n<div class=\"\">\n<h3 id=\"Tool%20Checklist\" class=\"Header_headertext__3bV7v Header_as-h3__282sZ Header_weight-600__2gG0d\">Tool Checklist<\/h3>\n<\/div>\n<div class=\"text-plugin\">\n<ul>\n<li><a href=\"https:\/\/www.megahobby.com\/tamiyats-colorsspraycans.aspx\" target=\"\u201c_blank\" rel=\"nofollow noopener\">Paint<\/a> (undercoat colors and topcoat colors)<\/li>\n<li><a href=\"https:\/\/www.amazon.com\/Trim-Professional-Natural-Buffing-System\/dp\/B00EGGWGGA\/\" target=\"\u201c_blank\" rel=\"nofollow noopener\">Buffing Sticks<\/a><\/li>\n<li><a href=\"https:\/\/www.amazon.com\/Zona-37-948-Polishing-11-Inch-Assortment\/dp\/B001BHGC7G\/\" target=\"\u201c_blank\" rel=\"nofollow noopener\">Fiber Backed Polishing Paper<\/a><\/li>\n<li><a href=\"https:\/\/www.amazon.com\/Galaxy-Tack-Cloth-12-Pack-TC12\/dp\/B00164CDZE\/\" target=\"\u201c_blank\" rel=\"nofollow noopener\">Tack Cloth<\/a><\/li>\n<li><a href=\"https:\/\/www.amazon.com\/3M-Painters-Multi-Use-94-Inch-60-Yard\/dp\/B00004Z4CP\/\" target=\"\u201c_blank\" rel=\"nofollow noopener\">Masking Tape<\/a><\/li>\n<li><a href=\"https:\/\/www.megahobby.com\/tamiyats-colorsspraycans.aspx\" target=\"\u201c_blank\" rel=\"nofollow noopener\">Clearcoat<\/a><\/li>\n<li>Safety Equipment: <a href=\"https:\/\/www.amazon.com\/Infi-touch-Nitrile-Gloves-Hypoallergenic-Thickness\/dp\/B00S8W7HN0\/\" target=\"\u201c_blank\" rel=\"nofollow noopener\">gloves<\/a> and <a href=\"https:\/\/www.amazon.com\/3M-Paint-Project-Respirator-Medium\/dp\/B00004Z4EB\/\" target=\"\u201c_blank\" rel=\"nofollow noopener\">mask<\/a><\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"step\" class=\"section-1062837 Grid_section__1cbIK\">\n<div id=\"\" class=\"section-1507753 Grid_section__1cbIK\">\n<div class=\"\">\n<h3 id=\"Painting%20Steps\" class=\"Header_headertext__3bV7v Header_as-h3__282sZ Header_weight-600__2gG0d\">Painting Steps<\/h3>\n<\/div>\n<div class=\"text-plugin\">\n<p><strong>1. Start with a primed and mounted part.<\/strong><br \/>\nIf you haven\u2019t removed supports and sanded the surface yet, get all the details in our <a href=\"https:\/\/formlabs.com\/blog\/priming-3d-printed-parts\/\" target=\"_self\" rel=\"noopener\">priming how-to<\/a>.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-163745 aligncenter\" src=\"https:\/\/facfox.com\/docs\/wp-content\/uploads\/2021\/08\/image-16.jpg\" alt=\"\" width=\"1280\" height=\"720\" \/><\/p>\n<p><strong>2. Buff and polish the primed surface.<\/strong><br \/>\nUsing the nail buffing sticks, gently polish the surface starting with level #2 (buff) and finishing with level #3 (polish). Afterward, the surface will look glossy.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-163746 aligncenter\" src=\"https:\/\/facfox.com\/docs\/wp-content\/uploads\/2021\/08\/image-17.jpg\" alt=\"\" width=\"1280\" height=\"720\" \/><\/p>\n<p><strong>3. Clean off the dust.<\/strong><br \/>\nRun a tack cloth gently over the surface of your model to remove any residual dust. Use a light touch and move in the same direction of the surface.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-163747 aligncenter\" src=\"https:\/\/facfox.com\/docs\/wp-content\/uploads\/2021\/08\/image-18.jpg\" alt=\"\" width=\"1280\" height=\"720\" \/><\/p>\n<p><strong>4. Get ready to paint.<\/strong><br \/>\nSuit up with your respirator and gloves. Stir your paint by gently swirling the internal mixing bead (called a \u201cpea\u201d) in the can for 2 to 3 minutes. The goal is to gently mix the pigment without shaking up the gaseous propellant, since this can cause bubbles in your spray.<\/p>\n<div id=\"step\" class=\"section-665756 Grid_section__1cbIK\">\n<div id=\"\" class=\"section-1507687 Grid_section__1cbIK\">\n<div class=\"text-plugin\">\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/formlabs.com\/_next\/image?url=https%3A%2F%2Fformlabs-media.formlabs.com%2Ffiler_public_thumbnails%2Ffiler_public%2F47%2F0e%2F470e291a-6a60-418b-b50e-cb853de9bbe7%2Fpreparing_to_paint_3d_model.png__1354x0_q85_subsampling-2.jpg&amp;w=3840&amp;q=75\" alt=\"Step 4: Get ready to paint.\" \/><\/p>\n<div class=\"text-plugin\">\n<p><strong>5. Spray on the undercoat.<\/strong><br \/>\nAlways start and end your spray off of the model to get the most even finish. Keep the nozzle about 6\u201d away and move quickly across the surface while rotating the direction of spray around the model. Your first few layers should look translucent. Once you have an opaque coat, let the painted model sit for 20 to 30 minutes to give the thin layer of paint time to dry. 2 to 4 layers will form an even coat.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-163735 aligncenter\" src=\"https:\/\/facfox.com\/docs\/wp-content\/uploads\/2021\/08\/image-1.jpg\" alt=\"\" width=\"1354\" height=\"379\" \/><\/p>\n<\/div>\n<div class=\"\">\n<div class=\"Picture_container__c3Cwe Picture_full-bleed__1toQP\">\n<div><strong>6. Polish between layers.<\/strong><br \/>\nUsing the finest sanding paper and polishing stick, lightly treat the model between coats of paint. This will continue to refine the surface. Do this between each step from now on.<\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-163734 aligncenter\" src=\"https:\/\/facfox.com\/docs\/wp-content\/uploads\/2021\/08\/image-2.jpg\" alt=\"\" width=\"1354\" height=\"379\" \/><\/div>\n<div><\/div>\n<div><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-163733 aligncenter\" src=\"https:\/\/facfox.com\/docs\/wp-content\/uploads\/2021\/08\/image-3.jpg\" alt=\"\" width=\"1280\" height=\"720\" \/><\/div>\n<div><\/div>\n<div><strong>7. Mask off areas you want to preserve in the undercoat.<\/strong><br \/>\nCut the masking tape with scissors or an X-Acto knife. Apply the tape firmly. Press down on the edges to keep paint from seeping underneath.<\/div>\n<div><\/div>\n<div><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-163732 aligncenter\" src=\"https:\/\/facfox.com\/docs\/wp-content\/uploads\/2021\/08\/image-4.jpg\" alt=\"\" width=\"1280\" height=\"720\" \/><\/div>\n<div><\/div>\n<div><strong>8. Apply the topcoat (optional).<\/strong><br \/>\nBy applying a contrasting color, you can create gradients or rich color blends. If you want the undercoat to show through, go easy on the paint \u2014 1 to 2 light coats is enough.<\/div>\n<div><\/div>\n<div><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-163731 aligncenter\" src=\"https:\/\/facfox.com\/docs\/wp-content\/uploads\/2021\/08\/image-5.jpg\" alt=\"\" width=\"1354\" height=\"379\" \/><\/div>\n<div><\/div>\n<div><strong>9. Finish with clearcoat.<\/strong><br \/>\nIf you\u2019ve polished the model between steps, then 1 to 2 light coats of clearcoat will make the surface look glossy (the topcoat will be nearly glossy by itself after polishing). Matte coats are also available and will protect your model for years.<\/div>\n<div><\/div>\n<div><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-163730 aligncenter\" src=\"https:\/\/facfox.com\/docs\/wp-content\/uploads\/2021\/08\/image-6.jpg\" alt=\"\" width=\"1354\" height=\"379\" \/><\/div>\n<div id=\"step\" class=\"section-665756 Grid_section__1cbIK\">\n<div id=\"\" class=\"section-1507687 Grid_section__1cbIK\">\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-163729 aligncenter\" src=\"https:\/\/facfox.com\/docs\/wp-content\/uploads\/2021\/08\/image-7.jpg\" alt=\"\" width=\"1123\" height=\"640\" \/><\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Spray paint has an image problem. Most often seen on graffiti, dripping utility signs, and patch jobs on rusty cars, designers often use it for quick coverage and a flat surface instead of detailed, artistic effects. But with the right technique, spray paint creates smooth surfaces and deep color gradients. If you\u2019re an industrial designer, [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":163729,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"kbtopic":[137],"kbtag":[126,587,153,586],"class_list":["post-163727","kb","type-kb","status-publish","has-post-thumbnail","hentry","kbtopic-case","kbtag-3d-printing","kbtag-painting","kbtag-post-process","kbtag-priming"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.1 (Yoast SEO v27.1.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>How to Prime and Paint 3D Printed Parts - FacFox Docs<\/title>\n<meta name=\"description\" content=\"Spray paint has an image problem. 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Most often seen on graffiti, dripping utility signs, and patch jobs on rusty cars, designers often use it for quick\" \/>\n<meta property=\"og:url\" content=\"https:\/\/facfox.com\/docs\/kb\/how-to-prime-and-paint-3d-printed-parts\" \/>\n<meta property=\"og:site_name\" content=\"FacFox Docs\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/facebook.com\/facfox3d\" \/>\n<meta property=\"og:image\" content=\"https:\/\/facfox.com\/docs\/wp-content\/uploads\/2021\/08\/image-7.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1123\" \/>\n\t<meta property=\"og:image:height\" content=\"640\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@facfox3d\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"18 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/facfox.com\/docs\/kb\/how-to-prime-and-paint-3d-printed-parts\",\"url\":\"https:\/\/facfox.com\/docs\/kb\/how-to-prime-and-paint-3d-printed-parts\",\"name\":\"How to Prime and Paint 3D Printed Parts - FacFox Docs\",\"isPartOf\":{\"@id\":\"https:\/\/facfox.com\/docs\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/facfox.com\/docs\/kb\/how-to-prime-and-paint-3d-printed-parts#primaryimage\"},\"image\":{\"@id\":\"https:\/\/facfox.com\/docs\/kb\/how-to-prime-and-paint-3d-printed-parts#primaryimage\"},\"thumbnailUrl\":\"https:\/\/facfox.com\/docs\/wp-content\/uploads\/2021\/08\/image-7.jpg\",\"datePublished\":\"2021-08-04T03:10:47+00:00\",\"description\":\"Spray paint has an image problem. 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