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If you want to paint polyester resin items or repairs, it’s important to select the right type of paint to achieve smooth, long-lasting results. Here’s how to choose and apply paint effectively on polyester resin surfaces.
Choosing the Right Paint for Polyester Resin
Paints formulated specifically for plastics—such as acrylic or polyurethane paints—are the top choice for polyester resin projects. These paints adhere exceptionally well to non-porous resin, resisting flaking and chipping. When painting items like fibreglass repairs or custom resin art, opt for products labelled for use on plastic, as they are designed to bond to slick resin surfaces.
Preparing Your Resin Surface
Proper preparation makes a significant difference. Begin by sanding the polyester resin gently with fine-grit abrasive to remove any shine and create grip for the paint. After sanding, wipe the surface clear of dust and grease. If the resin has been recently worked, consider polishing it using a suitable system like the Epoxy Polish to get a perfectly smooth base before painting.
Application Tips and Tools
For a consistent finish, use high-quality synthetic brushes—such as those in the Artists Paint Brush Set—or a small foam roller for larger surfaces. Apply paint in thin, even layers, allowing each coat to dry thoroughly before adding another. This prevents streaking and helps the paint adhere well over time.
When This Matters
Selecting the right paint and preparing the surface is crucial when you need your painted polyester resin repairs—or crafted objects—to withstand regular handling, moisture, or outdoor conditions.
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With the correct combination of paint type, surface prep, and technique, you can achieve a durable, attractive finish on polyester resin. For in-depth guidance on matching paints to your next project, see our full How to paint polyester resin guide.