![]() ![]() This slight roughening will help the paste adhere to the damage area. Wipe the surfaces clean with cloths or paper towels, then use 220-grit sandpaper to slightly roughen the entire repair area.Angle the sides of the damaged area so that the filler paste can be applied smoothly. If the surface is very hard or the damaged area is very large, a sanding drum or grinding disk attached to a drill or Dremel tool will make this preparation easier. Usually, this means cutting down between 1/16 and 1/4 inch. Make sure to cut down through the color layer of the acrylic or fiberglass into the structure below. Use a sharp utility knife to carve out a V shape around the edges of the damaged area.How to Use a Paste-Type Acrylic/Fiberglass Repair Kit Always follow the kit manufacturer's recommendations for safety measures. Good ventilation is required, as well as the use of an approved ventilator mask. This repair uses an epoxy-type filler that has hazardous fumes. The Spruce Home Improvement Review Board.
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