Here's the stuff, I've been using for about 4 years now:
http://www.meguiars.com/?pro-wheel-care/Hi-Tech-Wheel-Cleaner
Does the wheel brightener need to be diluted?
That tool looks cool....I'll try to find one at my local Auto Detailing store. I'll also pick up a sample of the MG Wheel Brightener to compare with the FX.
KRZ