it will all polish off ,just make sure you keep it oiled....can strip it off with something like naval jelly or rust remover solvent ( acid combo) just do NOT leave the cylinder it it, and flush it off real well...me I polish them off, and may use the chemicals in the corner (slots) of the cocking ears....hate to get acid on the inside of the bolt ( firing pin or extractor grooves) 8) :roll: :wink: