I’ve never done it and wanted to know how to get started. I just want to get rid of some scratches on my barrel.
What do I need and how do I do it?
Thanks!
If it were me I’d just hit it with some flat black Norrells moly.
Those aren’t scratches worth worrying about.
According to my bro, Randall from AR15barrels.com, you’d have to disassemble the entire upper, blast off all of the existing finish, and refinish the barrel from scratch. I asked him this about the LMT barrels that come with no park under the FSB.
Not even worth it.
You could go with Gotm4’s suggestion, but I’d just leave em. I occasionally spray paint my front sight base with whatever cheap flat black paint I have laying around to eliminate glare off of the FSB… you can’t even tell the difference.
They’ll also disappear if you put some Birchwood Casey Aluminum Black on the scratches. Then wipe dry and wipe down with oil.
Nick,shoot Keith an email and see if it could be powder coated…Should be fine for semi-auto but I might be concerned if it would handle the temps on any full auto stuff…
Spray the upper in Norrels coating and make it look better than new and a better coating to it and will help rust away.
Cold Blue might work better. 
Who needs coldblue?
Reed Knight has been posting lately… 
Scratches like that just show that you actually may have used the gun.
That’s character.
In order to properly re-park, the whole barrel comes off the gun, all small parts get removed from the barrel, barrel gets blasted raw and then re-parkerized.
We usually only do that when the barrel is getting profiled.
It’s certainly not worth it for a couple scratches like that.
Trim2L,
In this case you don’t know what you don’t know.
Actually cold blue doesn’t work better. The aluminum black despite it’s name does work extremely well on carbon steel (better than cold blue, you will just barely see the thin scratch like the poster posted if he uses aluminum black).
It’s also VERY good at removing scratches on the taper pins, flash hiders, FSBs, brass punch marks on sights etc. I also use it to touch up the staking I do on castle nuts/end plates etc.
Aluminum Black is GREAT!!!
My father bought me a bottle in the early 70’s.
I think I’m still using that same bottle for touch ups.