When I had the original pads and rotors I asked a person who I trust about just scuffing the rotors to try and get rid of the squeal. He said since the rotor is spinning and you want to break the surface where you see pad wear, the least obtrusive, and quickest way, it to go center to edge. It also was the most pain in th a%%. I did not want to scratch my center hub, or my edge of the rotor, just the wear area.xxxflhrci said:I've been running EBC Kevlars for 40k or so now with no problems....You can sand your rotors in any direction that you want if you are just scuffing the rotor to get the glaze off. I polish rotors with sandpaper and polish the breaking surface as well. I can't tell any diminished braking from it.