Thanks for the reply, Joe. I did ask on the website, but your answer is good enough for me. I have noticed that my BMW's (bike) wheels stain more easily than my car wheels. But they are clearcoated aluminum, whereas on my Kawasaki, they are anodized black, so the staining has not been an issue (I also do not have to work as hard on them, as they are black).
As for the free samples, thanks for the offer, but I am in Canada, and it's probably a big hassle to get them up here, not to mention the duty and stuff. I am going to look for some of the cycle specific stuff at Canadian Tire and try them out. Thanks again.