I may pick up an old Colt Pistol Positive from a friend. It is in very ruff shape to say the least. Is it worth it to re blue it? I know factory bluing is best but if it is gone and showing minor surface rust would it not be best to restore it. The caliber is .22 wrf and I know it is obsolete. I just like to buy old rusty guns every now and then and bring them back to the beauty they once had. Any feed back would be great thanks.