Sorry Scott, I PMed you a bit ago and then remembered there is a forum for this. And now I see your sticky saying don't PM you. Anyway, I have a white M35 with a dealer installed 3M clear shield. The other day a car in front of me threw up a piece of truck tire that proceeded to hit the lower lip of my bumper and go under. When it grazed the clear shield it left a nasty skid mark. Any tips on removing the black tire crap?