My father has an old Savage 410/.22LR over-under that he used years ago... been in his closet for a long time. We took it out over the weekend, and the outside of both barrels is caked with rust. What can we do to fix this guy up? Is there a treatment at home we can do or should we take it somewhere to be professionally done? The gun means a lot to him, and I'd love to fix it for him. Anyone have any suggestions? I think he tried to sand all the rust off before, and use new blueing from Walmart, but the rust came back worse. Is there anything we can do?! G19 - Gen 3 G37 - Gen 3 NEF Pardner SBI 12 Ga. Savage Model 24 - .22LR/410 Before pics loaded below... bad shape I know.