As Keith points out “silver finish on a gun is usually polished steel, or a case hardened surface that has lost its original colors. But it could indicate nickel plating. Bead blasting, even lightly, will result in a finish that is more matte in appearance, and polishing will be necessary to make it smooth and shiny again. “

More data about current condition and pictures will help with zeroing in on what you might do.

Michael Dittamo
Topeka, KS