I have an 02 1500 Chevy...and it's got 99,500 miles on it...4 wheel disc brakes...haven't had to do a thing to the brakes...yet?
I know when we had our 528it BMW wagon...they refused to turn the rotors...it had something to do with the softness of the material (would warp?) I don't know if they we giving us a line of crap...but the new rotors were about $90 bucks (employee discount

) each....
FWIW...