Thanks for the reply. This may sound a bit naive, but the rotors are new on the rear and almost new on the front. Should new-from-the-box rotors need turning?
The front set came from Advance Auto, while the rears came from BAT.
Would improper conditioning, particularly of the rear brakes, cause this problem? What is the best procedure for conditioning new brakes.
I did recall (or my wife recalled) that on the 1000 mile trip, the parking brake got left on for about 300 feet while leaving a rest stop at about mile 600.
I should say that after installing the new rear calipers, the rust film (presumably from non-contact by the pads) is gone.
What do you think - get them turned anyway?
