Colored gel coat hulls are a sharp touch to your boats appearance. Keeping them maintained is another story. As you can see in this picture. This 1990 blue Downeaster has some heavy oxidation (right side) on it. This boat was not well maintained over the years and was just left out on a mooring. Even though the compound has cleaned it up, within a matter of minutes it turned back to oxidized. If you have a colored gel coat hull I would recommend compounding and waxing in the beginning of the year, and once again in the fall.