I had a look at an over & under 16 gauge Browning that a friend had refinished with ( I believe ) DuraCoat. Sort of an epoxy finish. Normally, I'd go with professional re-bluing, but the Browning had surface issues, and although still an excellent hunting shotgun, it would never be a collectible. The DuraCoat finish did look nice. How long it will last, I do not know.