The above poster makes an excellent point regarding not blueing the inside surfaces of an action. When I worked at Browning Arms Co.'s gunsmithing shop, the inside surfaces of actions were always polished bright after rebluing. Removing the blueing makes the mating parts slide much more smoothly. The bolt ways inside of Mauser and Sako actions were polished as well as the inside of Superposed and Citori shotguns having the receiver internal surfaces and barrel lugs polished. Muzzles were polished just because it was a Browning trademark of sorts, like the gold plated triggers.
