This is a hinge from my mahogany doors:
These are the hinges after chipping the paint off with a screwdriver and thoroughly polishing them with WD-40 and 00 steel wool:
The WD-40 and steel wool did a marvelous job of gently removing the surface rust. It took about 5 minutes of careful polishing and scrubbing on each hinge to remove the rust.
Next up: An attempted door installation