Since the metal work was done by Clyde baker, I went to his book, Modern Gunsmithing. Years ago, I read of his use of pickling and etching solutions as preparation for finishing. I think I found, on page 352, the sorce of the finish I'm seeing on this bolt.
"I am convinced that failure with ready made solutions is often due to extremely high polishing of the surface, resulting in filling up the pores so that the solution cannot take hold. The No. 2 etching solution does not pit the surface, but merely cleans out and opens the pores, resulting in a fine velvety finish, far more practical than the high polish sought by some"
No 2 Etching Solution: Nitric Acid...1/2 oz.
Distilled Water...6 1/2 oz.
Can't swear to anything but I think this is what we're seeing. Good Lord, what a beautiful rifle.
