I have a couple older shotguns that I'd like to improve the metal bluing on, they aren't worth a whole lot but they're good servicable guns, an old Rem mod 17 pump 20 gauge, and an old Browning Auto 5 16 gauge. The wood I can look after but the bluing is my question. The Rem is the worst(no pitting or severe rusting, just years of wear) and the Browning has much more of the original bluing. Are there any products out there that restore without needing total stripping and bluing? What would you recommend?I appreciate any/all responses.