You don't want to try to remove the material. It may not be that thick a layer. It may only show up as a few ten-thousandths of an inch thick.If pad material left on the rotor can cause a pulsation of the brakes how in the world can you go about removing pad material with abrasives evenly and not cause additional uneven spots on the rotor surface. Is this material visible on the rotor. Asking because I have the issue for the second time in 35k miles and before replacing rotors I would like to give this a try. My thought was to use a 2" orbital air sander and hit the surfaces.
This still puzzles me however. Have owned several brands, sizes and types of vehicles through the years and have never had issues with brakes like this. Have never had to think about how I use my brakes. After a hard stop, consider not pressing the brakes to cause uneven pad material deposits on the rotors. Still can't help but think it's a design issue or I have just been lucky through the years...
It's SOP around here...Decades ago you could turn rotors about twice before they were too thin to use.
Today they make the rotors on a lot of cars so thin to save weight they can't take a turn at all before they are below spec and will warp at the drop of a hat because they are so thin.
It's becoming common for a brake job to include new rotors.