Well I ended up buying a few different ones to try. Got Collinite's 850 Metal Wax, Poorboy's World Wheel Sealant and Wheel Wax.
I plan on trying one of them on my wife's 2002 Toyota Highlander next weekend and I'm also going to take the wheels off of my Fairlane and polish the fronts and insides, then wax.
I'll post a report when I find out more....