Personally I would put an edge on it, do what ever you need to do to keep it clean, together, intact.....not sure on the word I am hunting for....degrading. In short I would not go off to make it look brand spanking new. I know you did not say anything to this effect, just saying how I view things that are passed down gen to gen. Make them serviceable, but don't remove a single scratch. Every mark tells a story.