I do the half-a-wheel test, rather than Left or Right. as I figure the amount of dirt/dust might vary between left and right, one side being near the edge of the road and the other near the center and opposing traffic. But, as I said earlier, my first test of Wheel Wax showed it actually got "dirtier" than the untreated half, so I'm not surprised.

I suspect another problem with a lot of these products is that many wheel cleaners may remove them. This means either not using wheel cleaners, making cleaning the wheels more difficult, or re-applying it every time you wash the wheels.

I typically use S100 and a soft brush to clean the wheels, and it makes it really easy -- just spay the wheel with water, put 3-4 fine mist squirts of S100 on the wheel, brush a bit with the long-handled soft bristle brush, and spray off with water. If I have to forgo the wheel cleaner or re-apply the treatment every time, then what have I really gained?

I did note that the Wheel Wax seemed to have a lot of "cleaner grit" in it, as compared to other wheel products, so it may make sense to use it periodically to more aggressively clean, smooth, and polish the wheel. But for routine use, I find it to have a rather poor effort to benefit ratio, particularly since my first test showed it actually attracted brake dust.

I've heard that PAM Cooking Spray works on wheels, so I might give that a test as well... making sure not to get any on the rotors or pads.