I talked to the guy that told me not to wax the bottom of the boat. He said the same thing as MAD11.  If you wax the bottom of the boat, it actually creates suction on the water. He said you should sand the bottom to make it go fast.  He then said if you are looking for protection, go ahead and wax it. He builds hydroplane and speed hulls so I figured he knows what he is talking about. He then added, "Dude, it really is no big deal with a ski boat, just do what you want. If you want to wax it, wax it, if you don't, don't."   He just smiled and walked away shaking his head. He went back to work glassing up a race boat hull.....  ÂÂ