Removing years of bad paint decisions from hinges and door knobs. Easy as water, heat, and baking soda. I actually did this in my old bungalow. Really very easy, butr emember, metal gets hot people.... I may or may not have burned myself.
From "The Ornamentalist," the click-through post has some absolutely gorgeous "...Doors of Prague," among which are internal and external doors, plus door ornaments, including this "ornate hinge: St Thomas Church, Prague."