Same thing on the Star Craft. Sand and rough the paint, do not remove it. The factory etching and primer can not be beat. Those processes and paints are not available any more for the DIYer. There are a few of those alloy Star Crafts still around Jax. The untouched alloy in a salt environment is still factory perfect. Anywhere a screw was attached with out Teff-Gell, is a mess. Buba at work; Here, hold my beer, as I set this stainless screw, into this alloy panel and ruin this boat's finish.