How to Sand Gelcoat on Boats for Repair & Painting (80, 150, 220, 400 Grit Guide)
Boat hulls and fiberglass surfaces with gelcoat often develop oxidation, scratches, or cracks over time. Sanding gelcoat is the essential step before repairs, polishing, or repainting. With the correct grit sequence, you can restore smoothness and prepare for coatings that...