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How about using little wire wheels and 3m type polishing pads on a dremel tool for that chassis.... Mine has a flex pencil adapter so you could get into small spots, and the bigger motor sits 3 feet away..... It's not like a chemical is going to leave you with anything more or less pretty than a wire wheel, or abrasive disk...
ebay has tons of those wheels, and other stuff direct from china for really cheap..... Just use USA eye protection, I bet those china wire wheels come apart fast...
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Yes you can call me "Squirrel boy"
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