3D printing has revolutionized how we create objects, prototypes, and custom parts. However, to make a 3D print look polished and professional, it often needs a good paint job. Painting 3D printed models not only enhances their appearance but also adds a layer of durability.
1. Surface Preparation
Before painting, it’s crucial to properly prepare the surface. Start by removing any support structures or imperfections. Then sand the model, beginning with coarse grit sandpaper (around 120 grit) and finishing with fine grit (up to 400 or 600). This smooths the surface and improves paint adhesion.
2. Applying Primer
Primer is essential for ensuring the paint sticks well and spreads evenly. Use a spray primer designed for plastic. Apply a thin, even coat and let it dry for at least an hour before painting.
3. Choosing the Right Paint
Acrylic spray paints work well for most 3D printed models. For detailed work, you can also use brush-on acrylic paints. Be sure to apply paint in light coats to avoid drips and ensure even coverage.
4. Finishing and Sealing
Once the paint is fully dry, apply a clear coat or varnish (matte, satin, or glossy based on preference). This not only enhances the visual finish but also protects the model from moisture and wear.
Extra Tips
- Always paint in a well-ventilated area.
- Wear gloves and a mask to avoid inhaling fumes.
- Test your paint on a scrap piece before working on your final model.