I had a set of legs come in on a pin that were completely orange - no joke, I thought they were unsalvageable.
I left them in an evaporust tube for about 2 weeks (other stuff got in the way; not sure if it needed the full 2 weeks) and.. sparkling shiny. I had not polished them or scrubbed st all except I wiped them down with a bit of aluminum foil to clean the goop off. No pitting really either!
I did still have to use PB Blaster to unfreeze the levellers (and replaced those). Still - The cult is real! Lol