I use a scotchbrite pad, doesn't remove anything. You have to rub in the same direction each time or it looks like a bunch of small scratches. Using any fine sandpaper will remove material and may polish the spot and make it appear different than the rest of the pistol. I clean the carbon buildl up on stainless revolver cylinders with it all the time. the muzzle just hold it down on the pad and twist back an forth