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Instead of water, use CocaCola or Naval Jelly. The phosphoric acid in those will convert the iron oxide into iron phospate. Iron phosphate is a final stage salt. It can't oxidize any further and will always stay the same.
You can use Naval Jelly on anything from key files to aircraft carriers. It also works great on camper tie-down chains, that get beat up by road salt and sand.
Look for Naval Jelly at Ace hardware, not in the jam section in the grocery store. It's NOT something the boys and girls in the navy smear on their toast.
Have FUN!
DearWebby
http://www.webby.com/humor
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