Brown spots after bluing

[TakCWAL]

Calgunners, I need your assistance once more.

I recently cold-blued my rifle as well as touching up some other guns. After everything is said and done, I have noticed small whitish-brown spots and I was wondering what I can possibly do to take care of them?

And will they affect my rifle in any way?

Thanks!

[jpscoot_21]

Sounds like maybe the metal had fingerprints or slight rust already starting at those spots? Hit it with some fine bronze wool and gun oil. See if that will remove the spots.

[bruceflinch]

What brand of cold blue did you use?
I've found that Brownells Oxpho-Blue is far superior to the Birchwood Casey stuff.

[TakCWAL]

Yeah, I did indeed use the Birchwood stuff.

It turned out to be alright, mostly. I was able to reblue one of my guns. But when I attempt to do some patch up on my other firearms, it developed white-brown spots after I finished it.

I was able to fix it a bit by doing what jpscoot_21 posted, but my other guns still have small spots I want to get rid off, permanently.

[Gunsmith Dan]

No Cold Blue chemicals provide any type of rust or abrasion protection... they are used just to color the metal black.

So you must keep a good coating of rust inhibating oil on the firearm at all times to prevent rust from forming.