From the inside:

  • Sand the area around the hole. Remove any dust and clean the surface using acetone.
  • Cut out 4 pieces of chopped strand mat that overlap the hole by about 2″ (50 mm) all the way round.
  • Wet them out using resin mixed with catalyst (this makes the resin go hard).
  • Place them over the hole layer by layer. Make sure the edges are pressed down well.
  • Leave to harden.
  • Sand down any rough edges to leave it smooth.

From the outside:

  • Mix gel coat with the colour pigment & catalyst.
  • Fill the hole making sure there are no air bubbles trapped in the gel coat.
  • Fill above the level of the surface.
  • Leave to harden.
  • Smooth down using wet & dry sand paper.

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