Nice coating. Is that rust-colored hi-temp? Flat brown cadmium plating? Didn't know that color was offered.
I don't see any retainers, but if the rotors look that bad, I wonder what the hubs look like.
Everything has to be really flat. Microns make a difference. Any imperfection in the hub face, or the rotor hat (where the wheel mounts), has to be removed.
After that, I'm out of ideas.
