I would not restore it if it was mine. Has nothing to do with value but everything to do with memories. My old mod 97 with 32" full choke barrel and steel butt plate has turned to silver patina. Over the years I have shot a lot with it, pheasants, rabbits, deer, quail, squirrels, and much more. It has been out hunting in all weather, good days, rain, snow, and freezing ice. Several of my hunting companions that were along on those ugly days have now passed on. All I have to do is look at it in the safe and the memories are staring back at me. Refinish it and all the memories are gone.