Originally Posted by
ColonelJLloyd
Oxalic acid crystals, water, 12 hours and a nylon brush.
Yup.
My faster dirtier method sometimes works too: Make a paste out of water & Barkeeper's Friend (which has OA in it). Spread it on the rusty area. Wait 5 minutes. Scrub with a scotchbrite pad. This got some rusty old steel rims looking nice last weekend.