I have a 1956 corncob wingmaster 20ga and to say they don't make em like that anymore is a understatement. Do not do anything to that gun but shoot it. They are only original once.
My Dad has a 1956 Wingmaster 12 gauge. All we did was shoot it, a lot! Clay pigeons, varmints, now it's behind the bedroom door. Come to think of it, it was always behind the bedroom door.