RE: To wax or not
I'm just chiming in because the truth is counterintuitive... what DMYC 42 says is the truth: don't wax.
The easiest to accept demonstration I've seen is to wax a bit of the hood of a car and then dribble water on adjacent waxed and unwaxed parts of it... notice that the water does its darndest to resist flowing across the wax while it'll flow smoothly over a dull, unwaxed area.