Soak it in Apple cider vinegar; rinse in fresh water; dry it in the sun or an oven; and, coat it in clear plastic or black plastic paint. Typical chain and ring used on farm equipment--mechanical or manual; also, used on mule full harness gear for puling plows, discs, seeders and so forth. We always kept a few on the tractor for wrapping and pulling fallen trees or stumps. I paid for a lot of college tuition from dollars I earned working on a tractor--mowing, planting new pasture, clearing brush and so forth.