An outstanding, easy, and less expensive option is to properly repair the boat with what it was built with: Polyester resin, glass, with a layer of gelcoat. The problem with using epoxy is twofold:
1) Gelcoat will not properly cure over some epoxies.
2) It's more than double the cost of polyester.

You don't need the bonding ability of epoxy for this type of repair, just fix it properly and gel coat. For a good primer on f-glass repair go Here.
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or Here.
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