Re: oxidized paint: cleaner wax rec?
Try using 1000 grit wet sandpaper. Make sure to keep it wet. You can sand out the old dried out gel coat. Sand until you start seeing the color run out in the water, and all of the white residue is gone. Buff it out with a power buffer and rubbing compound followed by several coats of boat wax. Automovtive wax works but doesn't last as long as the marine formulas. I used this method a restored red gel coat from white back to a deep red. The gel coat with the color in it is thicker than you think.