suck to clean. mine have stains. i washed them with original mini wheel cleaner gel, works for the dust and stuck on dust but the only thing i found to help with stains was reducer found on my local man from M.A.R.S.' van.

 

i got rid of the stock brake pads, helped some.. i mean to wax the wheels sometime soon to see if it helps keep the remaining dust down.

nothing like clean white wheels on a red+white MINI (i think)

 

well i waxed the outside, but i wanted to get the stains off before i waxed the backside.
im told they arent the stock pads, guy said he spent like $300 on pads alone. they stop good btw