Defarbing a Swiss Arms 1911A1 Part 3 Part 2 Part 1
Antique or battlefield worn finish
By Dennis Adler
When we ended Part 2 the frame, slide and small parts had all been polished out. It is not a perfectly polished finish like a nickel gun; it is a gun in the white, a canvas upon which you can paint a picture of a much older and battle worn 1911A1.
Everyone says that you cannot use cold blue on aluminum alloy. And you can’t if you want a like-new blued finish. But if you want a worn, almost grey finish with blue tones, and some high edge wear, or a faded look, then you can use cold blue and a little gun oil to create a weathered finish. It works on steel, and it will work on a polished out zinc alloy air pistol.
Birchwood Casey Perma Blue worked perfectly on the polished alloy parts of the frame. I tested it on the grip safety first, and this is after one application and a light coating of gun oil to set the color.
The mix and the application
I used Birchwood Casey Perma Blue cold blue and gun oil on the polished grip safety as my test area to see what the finish would look like. If this finish remains consistent for the entire grip frame, then this combination will work as expected. Using cloth patches I applied the cold blue to the grip safety and watched it turn dark blue black and then haze to a dark grey, at which point I applied another patch with gun oil that set a rather well aged grey tone to the piece. It also left a little gloss. After rubbing it out with a clean patch I had a variegated blue grey part that looked old and faded. At this point I was satisfied with the look and completely disassembled the gun again to work on the individual parts.