Two years from now, when you're tired of the constant cosmetic repairs, you can sand it off and do it the right way.
Two years from now his boat will still look great, with little or no maintenance if its been painted with a two part marine paint.
Bill: I could be wrong on this but I don't think CC understands about preparation and adhesion. YOUR boat will look good two years later. Someone new to all this. . . not so much.
White gelcoat is the inexpensive, lazy man's way. If you want to jazz it up, PM Robi for some decals.