I have a 16ga. shotgun that belonged to my dad when he was a young. It's an Iver Johnson single shot. I don't think it has much monetary value, but I like it as a tie to my youth. I've stored it in a closet for years and it has developed some rust. Can a gunsmith remove this and re-blue it? What's a reasonable cost to expect? Should I pick a gunsmith from the yellow pages?