Wet sanding is used when gelcoat damage is too severe for conventional polishing techniques. Water and ultra-fine sandpaper are used to carefully level the fiberglass's surface.

This method removes deep oxidation, uneven textures, and scratches that buffers cannot. After sanding, a multi-step polishing process restores the smooth, glossy appearance.

Technicians measure the thickness of the gelcoat in advance to ensure a safe and controlled sanding process.