Even after a successful 3D print, the result usually isn’t ready to display. Visible layer lines, supports, and print flaws often need post-processing. Among all finishing techniques, painting is one of the best ways to give your print a polished, colorful look. But before painting, surface prep is essential — paint highlights imperfections if not addressed properly.
Paints like acrylics, enamels, oils, and lacquers all work for PLA and ABS, but acrylics are best for beginners due to their quick drying and easy cleanup. While brushes are cheap but imprecise, and airbrushes expensive and complex, spray paints offer a great balance of ease and cost-efficiency.
Start by removing supports and rough edges using tools like knives, pliers, or sandpaper. Be cautious of flying debris and sharp blades.
Begin with coarse (120-grit) sandpaper and progress to finer grits. Sand in circles, avoid corners, and wet sand after 200 grit for smoother results. Clean and dry the model before moving on.
Priming smooths the surface and helps paint stick better. Use a plastic-safe spray primer for even coverage. Shake gently, apply thin coats in quick bursts, and sand between coats if needed. Use spot putty for fixing deeper flaws. Two light primer layers are usually enough before painting.
Once primed, you’re ready to paint. Use painter’s tape to mask areas. Apply two light base coats, followed by a few heavier ones, pausing between each. For extra durability and gloss, add a clear topcoat. Let everything dry overnight, then polish if desired.
Paint in a clean, wind-free area. Use multiple thin coats instead of one thick one. Protect your workspace and mount your print for easy access. Avoid handling while drying. Always wear safety gear—spray paints can be harmful. And remember, planning your paint job should start early in the design phase.
Let’s bring your vision to life! Contact 3DX, today to discuss your 3d printing needs. Whether it’s refining a design, creating a prototype, or scaling up for production, we’ve got you covered.\
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Source: https://all3dp.com/2/beginner-s-guide-to-painting-3d-prints-pla-abs/
