Depending on the rotor type, you may be able to powder coat them completely, then turn the contact surfaces on a brake lathe to remove the coating. This would work nicely for finned automotive rotors, but I'm not sure about motorcycle rotors. If your rotors are cross drilled, it may not be a good idea to have the vent holes coated. As the rotor wears, plastic will be introduced onto the braking surface.
Hemi-T
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