How to Paint FRP Panels

FRP (fiberglass reinforced plastic) panels — common in commercial kitchens, bathrooms, and other wipeable-wall-surface applications — can be painted, but their smooth, glossy, non-porous factory surface (exactly what makes them easy to wipe clean and moisture-resistant in the first place) needs the same deglossing and bonding-primer approach covered for any similarly slick material.

1. Clean thoroughly first

Wash with a degreasing cleaner to remove any grease, grime, or residue — FRP panels are often installed in kitchens or other grease-prone environments specifically because they're easy to clean, which also means they commonly accumulate a genuine amount of grease that needs full removal before painting.

2. Sand or deglaze the glossy factory finish

220-grit sandpaper, sanding the entire panel surface until it loses
its factory sheen, or a liquid deglosser as a chemical alternative

FRP's whole functional purpose depends on a smooth, sealed, non-porous surface — exactly the same underlying challenge covered for any glossy sealed material, and the same deglossing solution applies directly here.

3. Clean off sanding dust

A tack cloth or a cloth dampened with mineral spirits removes sanding residue before priming — skipping this step undermines the deglossing work just done, the same way it would on any other surface.

4. Use a bonding primer rated for plastic or fiberglass surfaces

A primer specifically formulated for plastic, fiberglass, or other slick, non-porous surfaces — not a standard all-purpose primer — gives the topcoat a genuinely reliable adhesion base, following the same product category covered for painting fiberglass and plastic generally.

5. Choose a paint suited to the panel's actual use environment

For FRP panels in a kitchen or bathroom specifically, a paint with good moisture resistance and washability (similar to the durability considerations covered for high-moisture, high-wear surfaces generally) makes sense given the environment these panels are typically installed in.

6. Consider whether painting undermines the panel's original purpose

FRP panels are often chosen specifically for their easy-clean, moisture-resistant surface — painting over that factory finish, even well, generally results in a surface that's somewhat less wipeable and durable than the original FRP finish itself. This is worth weighing before committing, particularly in a genuinely high-grease or high-moisture commercial setting where the original surface's specific properties may matter more than a color change.

7. Realistic durability expectations

Even with proper prep, paint over FRP panels in a demanding environment (commercial kitchen, high-traffic bathroom) may need more frequent touch-up or recoating than the original unpainted FRP surface would have needed — a genuine trade-off for the cosmetic change, worth factoring into any decision to paint over this specific material.