Have you heard about the MacGuiers (sp?) spray boat wax? I've never used it, but I have a bottle that I'm a little timid to use. I usually spray down the boat with their "quick clean" and that seems to clean it nicely.
I just detailed the boat with Meguiers Premium Marine Wax (Black Bottle). Stuff worked great. When it comes to buffing the wax off, this stuff just wiped off like a polish. I didn't even use the orbital buffer to take the wax off.