Re: wax on....
It'll be fine. Just a bit harder to buff off.
Don't wash the old wax off, it'll just make a bigger mess. Buff it off.
Wax will not make you go faster either. If you want to get into that debate, the wax forces the boat to re-wet itself, which technically speaking will slow it down (but in any case doesn't matter with powered boats like ours anyway). But the whole point is moot, because the wax will get stripped off in short order on any planing boat anyway as it goes on and off plane.
I read in some yacht magazine that wax gets left on for the entire layup season and then buffed off in the spring. But what the hell do they care, they're paying other people to do it for them!
