Removing Rust with Citric Acid

[HawkX66]

Those are some great results Jason. I used vinegar several times and had similar results without the heat and circulation. I used it straight though. I didn't do it on anything as big as a block. That was pretty impressive. It even left some of the orange paint that was hiding under the rust. I might have to give the citric acid a try. It seems like you can create larger quantities for much less $.