First, follow the brake lathe manufacturer's recommended speed setting for applying a non-directional finish. Second, using moderate pressure, apply the non-directional finish: if the lathe is equipped with a non-directional finishing tool, apply the finish with 120-grit aluminum oxide sandpaper. if the lathe is not equipped with a non-directional finishing tool, apply the finish with a sanding block and 150-grit aluminum oxide sandpaper. Thirdly, after applying a non-directional finish, clean each friction surface of the brake rotor with denatured alcohol, or an equivalent approved brake cleaner and wipe each friction surface using a clean shop towel to remove metal particles remaining from machining. Repeat the cleaning process if necessary to remove all metal particles.
By BobGM Specialist
01/11/2022