I have a No.4 Mk1/2 that started life in 1943 as a standard Mk1, then was rebuilt by the arsenal into a Mk1/2. I got this rifle cheap and would like to restore the metal since it has virtually no finish left on it. It currently has remnants of a black paint finish, but I wasn't sure if that was the original finish, or if it might have been blued or parkerized. Thanks for the help.