Can I Sand Epoxy-Coated Polystyrene?

How and When to Sand Epoxy on Polystyrene

Only begin sanding your epoxy-coated polystyrene once the resin is completely cured—check the manufacturer’s guidelines for the safe curing time. Use fine-grit sandpaper, ideally 600 grit or higher, to gently address any runs or imperfections in the finish.

• Sand slowly and with minimal pressure to avoid exposing or damaging the polystyrene beneath.
• It helps to sand in small, circular motions, checking your progress frequently.

Safety Precautions

When sanding epoxy, tiny dust particles can become airborne. Always wear a dust mask or respirator and work in a well-ventilated area. Protect your hands and eyes as well, since cured epoxy dust can be an irritant.

Recommended Products for Epoxy-Coated Polystyrene

For best results, use an epoxy resin that cures clear and smooth, such as “Trasparente” Multipurpose Clear Epoxy Resin. It delivers a glossy, self-levelling surface up to 2cm in thickness, ideal for many polystyrene applications. For smaller or more detailed work, “One-2-One” and “Liquidissima” resins are also suitable picks.