[quote=fulcrum]Thanks for the advice halliske and dennis. Actually most of what you see was caused by me using my disc sander with an aggressive grade disc. I wanted to see what was actually going on with the fiberglass below.
Dennis, what I found actually was that someone had already done just what you suggested, which is why I found my boat has extra ports on the fore decks. And I'm the poor bugger that has to go in and fix it... what happened was that the glass they laid down did not bond to the hull completely on one side of the boat, leaving a less than watertight seal.
I just tried to break that glass away as best as I could, and I sawed a decent sized hole in the bottom. I'm laying down one layer of glass from the inside, but I'm then going to lay up another two sheets from the outside to bond to it. I tried to clean it up on the inside, but its tough to prepare a surface that has 30 years of crud on it, even after sanding and acetone. Hopefully that will give a better seal. I'll fair any rough edges with epoxy mixed with microballoons.
Its tough that the repair has to be right on the bottom edge though. I'll have to remove a fair amount of gelcoat to get my outisde glass to bond to the hull.[/quote]
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