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Tartan 27' owner
5,238 Posts
Wow. SailingDawg must be on his boat or something or he would have given his ABYC standard answer by now.
I think his suggestion would be something like this:
- grind and bevel the surface to a 12:1 surface incline (for a gouge 1/4" deep that would be a 3" bevel at 12:1)
- fill your beveled repair area with West System epoxy (thickened with some colloidal silica) AND glass mat. Build up layers of cloth until you reach the level of the surface,
- fair the repair (by sanding) after taping it off
- apply gel-coat or paint over the repair

The West System how-to manual IS online at their website: Fiberglass Boat Repair and Restoration

It should only cost you about $100 in materials but it will take quite a bit of time and learning.
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