How do you get rust off of metal?
Soak metal in white vinegar for a few hours then scrub the rusty paste off.
It depends on how deeply the rust has corroded the metal. If the rust is just on the surface, you could use a wire brush, or sandpaper, or a file - plus elbow grease. If the rust is deep, you could use a body grinder. Urban legend says Coca Cola removes rust, but it doesn't, really.
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