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You can use thickened epoxy. Don't use the colloidial silica or microballon filler. I'd recommend using the chopped fiberglass filler. Sand through the gelcoat and apply the thickened epoxy to the fiberglass. After it cures, wash it down with water and a scotchbrite pad to remove the amine blush, sand it fair, and then apply the barrier coat.
One question—is the grey and red/brown coloration remaining bottom paint??? If so, then the guy did a really lousy job. If it bottom paint, you'll need to remove it all, down to the gelcoat. BTW, it looks like there is some crazing or alligatoring of the paint or surface. Is that in the gelcoat or just in the remaining paint??
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
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Still—DON'T READ THAT POST AGAIN.
Last edited by sailingdog; 03-18-2008 at 05:33 PM.