Nickel Boron? I'm not sure. However, with Stainless Steel you can with Flitz.
I recommend you try Cape Cod Metal Polishing Cloths. You can get these at Ace Hardware. Be careful how many you buy because one cloth will last a long time after it appears dark. I suggest you get a three pack and try them.
Have fun trying my friend.
What's the scoop with these cloths? My googling seems to indicate they are used to take the tarnish out of silver or stainless steel surfaces. Are you recommending them as a finishing step after the bolt has been polished gently, or are you saying go straight in with these and lots of elbow grease?
Side note, I'm really wondering because I'm still working on a shotgun polish job that I want to be a true or damn near mirrored surface.
I got my Bolt Carrier Group back from WMD guns and the Nickel Boron looks so good I am not going to polish it.
I "buffed" mine to clean it up before I applied FrogLube to it. I'd post the pic I have but my open Noveske dust cover is a no-no here
ok a little paint shop to keep it forum friendly