I have a strange problem going on with my 3 year old braking system. Akebono pads matched with Pilenga rotors (uncoated) that were bedded in correctly. The fronts are rock stars but both rears are scaling (for lack of a better term). I've read that rust from not enough usage or highway miles can build on the rear rotors because it doesn't get enough friction compared to the fronts so it builds and builds then chips off. Makes sense to me and they dump a ton of salt on the roads around here in the winter. I'm going for at least coated rotors this time because supposedly the rust migrates from the edges where the coated ones can put up a better fight. I'm halfway thinking of going to semimetallics to help eat the rust. I'll take any thoughts/feedback.