I need advice.I recently acquired a 1960 vintage superposed lightning in good to very good condition.I wanted it as a good field gun and love the way it swings and handles.I don't want to reblue ,but it has some bad blueing loss due to corrosion on left side of barrel,but no metal pitting.Also,My main concern,The vent rib is starting to come up at the rear of the barrels.How are they repaired and should I continue to shoot it until I find someone reliable to fix them.I have a Beretta auto and a 870 in lockup.Thanks,any opinion welcome.