well I finaly had enough of the break dust on my front rims today so after work I actually took the tires off and cleaned the backside of the rims also, they were so black from all the breakdust it took 3 times of spraying wheel cleaner and brushing to get it all off, now they are squeaky clean and hopefully the break dust stays off for awhile, I will post results and tell you if it takes longer for the break dust to accumulate on the front of the rim now