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Remove most or all the rust from nuts, screws, bolts cheap and easy. I am working on cleaning up a free bike that I got. It was very dirty and rusty. A lot of the rust came off easily. Some of the screws were pretty rusty. So here is one of the tricks I use to remove the rust from them. I simply put them in a plastic bottle with some apple cider vinegar and shake them every once in a while. Very easy! You will have to remove the screws from the bike.