This is the cheapest, fastest and easiest way to remove rust or clean off rust. It is nothing but inexpensive white vinegar that you can buy anywhere.
This only took a few hours to clean off all the rust. If you have to clean off extremely heavy rust it may take a couple days of soaking the rusty part in a 50% solution of white vinegar and water.
It always works to safely remove all the rust, if you let the vinegar work long enough and give it enough time.
