Rust stains are annoying, but they aren’t invincible. You’ve got the tools, you’ve got the know-how, and you’ve got a story to tell the next time a friend spills their coffee near a metal table. Wave your lemon-salt paste like a wizard’s wand. You’ve earned it.
Now go forth and make those stains blush. I’m rooting for you. And your shirt. And your sink. And that patch of concrete in the garage.