Browned The Iron Parts:
For the barrel, I used Laurel Mountain Barrel Browner and Degreaser. It worked great.
Before I browned the cock assembly, I wanted to flatten the two sides of the cock screw head and drill a 3/32" hole thru the head. This allows for easier tightening of the flint in the head of the cock of the hammer.
I also engraved the heads of the screws. 
I used Plum Brown and hot browned all the other parts. Once I reached the color I wanted, I scrubbed them down with baking soda and then let them soak in a bath of old motor oil.
Here is a photo of the finished lock: 
Hoot AL Rifle Shop
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