Bob, very nice gun. I have to agree with Bill about removing fine slotted screws and ruining them. Too hard to replace. What I would do first is try using some alcohol on a lint free rag and try rubbing what finish is left onto where the finish is worn. If the alcohol doesn't work try lacquer thinner and again use a lint free rag and do the same and try to "melt" the old finish and move it to the worn area. Do this enough and the it will cover the whole area with a very thin finish. You can then add some varnish to another lint free rag and rub this on very lightly until you get the desired finish you like.
If you want an oil finish then you will have to strip the old finish very carefully so as not to remove the gold inlays.
