I saw them today while shopping. I havent used them yet as our current supply for wheels works well. An easy way to repel brake dust and avoid it caking to the wheels is to wax them; it works like a charm.
i got this stuff that was a "barier" for brake dust and rinsed off with water.......i was GROSS. it was a thick gel type thing that would "melt" off what water would get on it. you prayed it on and even if you hit a puddle or even a spot of water got on it, it would start to melt......nasty!