I spotted this white paper on the Centric Prart’s website. It is an interesting approach to removing friction material from rotors. The paper comes from Centric’s Stop Tech Division. On large expensive rotors, the procedure makes sense when compared to machining the rotor. The disc thickness variation (DTV) caused by friction material is a real problem, especially if the vehicle is using a pad that generates high cold torque numbers using transfer layer tribology.
Removal of Uneven Pad Deposits with Aggressive Friction
Uneven pad deposits can often be effectively removed from rotors by using a pad compound that is more
abrasive at lower temperatures. StopTech has found the Hawk 9012 (Hawk Blue) compound to be particularly effective in removing uneven pad deposits from rotors. Other higher temperature performance pads may also effectively “scrub” off uneven pad deposits, however we have found the Hawk 9012 to be the best for this application.
WARNING- Only keep abrasive pads in place long enough to remove the uneven deposits. Leaving pads that are abrasive at low temperatures in service on the street longer than necessary will dramatically wear rotors.
To download the complete paper, go to CENTRIC PARTS