You did not say that you turned the rotors.
Before rotors are turned they should be inspected for thickness variations.
After rotors are turned they should be inspected for discolored areas.
Extreme heat makes spots on the rotors which are harder, and resist wear. These areas become raised and cause increasing pulsation as the rest of the rotor wears. If this is the case, the rotors must be replaced.
Always follow procedure for seating and conditioning new brakes.
