Well the flakes under the rotor - I'm not sure where they came from, The front isn't bad at all.

The 'dust' in the rear brakes, esp the left side, could quite possibly have came from the wuarter panel. You wouldn'r beleive how much flaked off when the top of the tire hit the opanel when I was taking it off. I looked at it closer and thought, wow thats not going to last much longer.