How come almost every 3 series I see on the road have very dirty wheels, covered in brake dust? Some are so bad the lower half of the whole length of the car is covered in the gray dust! The reason I bring this up in the M3 group is, I just checked out the Anthracite pic below and the wheels look aweful. I also read in one of the scanned M3 reviews that the US will be getting different brakes due to us not liking the noisy European brakes. What effect does this have on dust? Will I have to scrub my wheels every night to keep the car looking good? Or do people just get tired of it and drive around with dirty BMW's???