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Once polyurethane resin has fully cured, it can be painted to achieve a range of decorative effects or a smooth, colourful finish. Knowing how to prepare and paint cured resin means you can truly personalise your casting projects.
Preparing Cured Polyurethane Resin for Painting
Proper surface preparation is essential to ensure paint adheres well to cured resin. Begin by making sure the resin piece is fully cured and dry. Lightly sand the surface with fine-grit sandpaper to remove any sheen and create a slightly rough texture. After sanding, clean off dust with a damp cloth and let it dry thoroughly.
- Sand the cured resin gently
- Wipe away all sanding residue
- Allow the surface to dry before painting
Choosing the Right Paint and Finishing Touches
Acrylic paints are commonly chosen for use on cured polyurethane resin thanks to their strong adhesion and versatility. You can apply multiple thin layers to achieve your desired opacity and allow each coat to dry before adding the next.
If you’d like to achieve a glossy and professional finish, consider applying a layer of transparent doming resin, such as Be Flex Transparent Polyurethane Doming Resin, over your painted piece once dry. This will give your item a glass-like coating and added protection.
When Painting Resin Matters
Painting cured resin is particularly useful for model makers, artists, and hobbyists who want to enhance detail or correct colour after casting. It’s also helpful when you’re aiming for a custom result that can’t be achieved by tinting the resin before casting alone.
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Painting cured polyurethane resin opens up a host of creative options for your castings. For more guidance and colour ideas, explore our hub on how to colour polyurethane resin.