I've got 8300 miles on mine, and I bought it new. The wheels have never had anything but carnuba (SP?) wax applied to them, and then daily dusting, with a car duster reserved for the wheels only. (It gets too dirty to use on the paint afterwards)
My wheels still look new. Not a brag. Just sharing info.
Have any of youze guyz used any cleaners, like brake cleaner? Or metal polish?
One time, a young ignorant Vette owner I used to know, ah-hem, well, he used brake cleaner, to get the entrenched brake dust off his aluminum rims. The brake cleaner ate through the clear protective coating, leaving the aluminum bare, after which it oxidized rapidly. That was one unhappy Vette owner! After that I, oops, I mean "he", never did that again!