Last spring i replaced my rear brake pads. I should have replace my rotor at the same time, it is worn fairly bad. My question is can you turn the rear rotor on a lathe or clean it with scotch brite? My brake pads are still pretty good and i think i can get one more season out of them. what can i do (if anything) to clean up the rotor and get a little better performance out of it for one more season?