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AR15.COM
10/5/2008 7:44:33 PM EDT
I have a CMP Mossberg M44US and it is flawless except for some smal scratches that are near the front sight.  I guess the armorers dinged it up a bit.  I polished one of the larger ones out with some fine emory.  The Birchwood Casey gel stuff I have wont blue the metal.  Its a tiny spot, about 1/8" round that is bare but this stuff turns it black and then seems to just wipe right off..
10/5/2008 7:50:18 PM EDT
[#1]
Brownell.com Oxpho Blue
10/5/2008 7:51:08 PM EDT
[#2]
44/40. Brownells sells it now.
10/5/2008 7:51:10 PM EDT
[#3]
Brownell 4440
10/5/2008 7:52:42 PM EDT
[#4]
I like Brownell's Oxpho Blue (haven't used the paste so can't comment on that).  I have used their Formula 44/40 and don't give a damn for it.

When using Oxpho Blue, after prepping your metal, heat it fairly warm to open up those pores, the bluing will work much better and stay lots longer.

10/5/2008 8:33:37 PM EDT
[#5]
I use Birchwood Casey blue in a tube followed by Oxpho blue, and repeat the degrease-BWC-Oxpho cycle 5 to 10 times.  Birchwood Casey makes a nice dark black color, the Oxpho blue seems to toughen it up.  At least that's my impression; in any case, it works.