you're going to need to remove the rub rail to that point then grind that back both sides of damage 6 to 8 inches then get all the damaged glass out and cleaned up, then reglass the patch starting with smaller patch, each layer getting about 2 inches larger until you have the complete area ground patched. next line sand smooth feather out with either fairing putty or resin and micro ballons. sand smooth again and paint that area to match.
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1978 V20 Cuddy w/ 225 Johnson. And Several other boat's
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