Merrymeeting may be right. Waxing vehicles is one of those subjects that is long on opinions and short on facts, much like engine oil. I may have chosen to give more weight to the "don't wax the bottom" opinion because I didn't want to lay on my back and do it
My boat is in the water all summer, every fall they power washed the gunk off and it looks as good as new. What else could I want?
It certainly can't hurt to wax, although some say it will slow your boat down. Which again contradicts the "doesn't stand a chance" theory.