I have used it for the last two weeks (daily when I clean them) and even did one side and not the other and then switched sides (in case I brake more while turning one way than the other) to test how it was working.
I don't remember Marco claiming that the spray would repel brake dust. In fact, in my experience a sprayed wheel will actually collect a little more dust than an unsprayed one. But the dust slides right off on a sprayed wheel. In fact, when I use it in conjunction with the Meguiar's wheel cleaner I bought, I don't even have to touch the wheels to get the dirt off except to dry them (and then again to get the rust that sheds off the rotors after I drive it 300 feet
). But in-between washes I use either Meguiar's detail spray or Zaino detail spray and they wipe clean quite easily. Maybe this has something to do with the fact that I clean them daily?
If I spray a wheel heavily, it seems to collect substantially more dust than an unsprayed wheel. If I spray it really light (maybe 2 seconds a wheel or so) it works great. Maybe you could try misting each wheel lightly next time and see what happens. :dunno:
I haven't had the spray in a few days - I think I left it outside of my garage and somebody threw it away or something. I need to go back and get some more!
As an aside, I have found that the spray does mask some of the gloss on the wheels and gives them a 'soft' look instead of shiney. I wouldn't use it if I were showing my car.
My two cents.