If you only have rock chips on the rear then consider yourself lucky, I have them both front and rear. I've had more chips doing 50kph here in North America then at 200kph in Germany. WTF, great roads. That being said I have a feeling it is quite prevalent, especially with sticky tires that lift debris off the surface of the road only to be flung into the body of the car. Always cringe when I go over loose whatever on pavement and hear the pinging, pretty sure I'm not the only one.
edit, dr. colourchip only works for "single layer paint" as they say. Even though we all know every m3 has several 'layers', colours like mineral white require a tri-coat and as such aren't as effectively blended when using dr. colourchip. So I guess I'm outta luck.
Last edited by Canuckles; 11-28-2011 at 02:02 PM.