Dealing with Bubbles or Blisters in Resin Coatings

Why Bubbles or Blisters Form

Bubbles can develop in resin coatings due to trapped air, excessive application thickness, or moisture on the steel bracket’s surface. Blisters often result from incomplete curing or contamination. Both issues not only detract from the final appearance but can also compromise water resistance if left untreated.

Step-by-Step Correction Process

• Allow the resin to cure fully: Do not attempt to fix bubbles until the layer is completely set.
• Sand imperfection zones: Use fine-grit sandpaper and gently sand the affected areas until smooth, taking care not to damage surrounding layers.
• Reapply resin: Clean off any dust, then mix and apply a thin, even coat of resin such as the Resin Fibreglass Repair Kit or a bubble-resistant product. Work carefully to reduce the introduction of new air pockets, and consider using a roller or brush suitable for resin application.

When Meticulous Repair Matters

In marine environments, even minor surface imperfections in a resin coating can lead to moisture ingress and premature corrosion of steel brackets. For long-term reliability, smooth repairs and proper recoating are especially important on components exposed to constant wetting, physical impacts, or UV exposure.