I have a Remington Fieldmaster 572 that has seen it's better days. There is some slight rust on the barrel and some of the finish is gone on the receiver. I want to refinish the metal, it was my grandpa's gun so I want it to last a good long time. I was thinking of cold bluing it or using duracoat. Which of these is easier, and toughest. It will primarily be a squirrel gun, not a safe queen. I want a finish that will last, but not break the bank to achieve a nice finished product. Any help is greatly appreciated.