I'm for waxing it, like it's going to make that much a difference in speed....... There is no white gel coat on my boat, it's all yellow, blue, orange, purple, etc.. If I dont wax the thing every few trips I cant get the water spots off. Maybe it's not so noticable on a white hull but the majority of my bottom is dark and light blue and it shows everything.
Wax the boat, and wipe the entire thing off with vinegar and water at the ramp as soon as you pull it out of the water. Including the trailer. I also have my wife wipe the entire interior with 409 or fantasctic while I'm doing the outside. Dont every put armor all or any kind of conditioner on the vinyl, it makes the stitches collect dirt and your interior will eventually look like crap!!! My boat is only in the sun a couple of weekends a month in the summer, the interior will not fade or wear out from the sun or the elements. Its four seasons old and looks newer than most of the boats I see 1 season old. I contribute that to people using that maguires or what ever brand of marine vinyl conditioner they sell in the marine shops, on there boats. Look at the stiches of poeple who use that crap and you will see how dingy and dark they look.