I use the wheel wax - it is very good - easy to apply, but you really need to get the wheels spotless and dry, off the car, and apply several coats for the full effect. Brake dust just wipes off with your finger...but needs to be kept clean to make the effort of waxing wheels productive.
I think, 99% sure, I am now going "darn saff" on Sunday for Lex body mod, so don't think I'll be going to the national - a pity as I was 99% sure of going too.
Brian []