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There are too many nooks and crannies there to get all of the paint and rust off by hand. There is bound to be paint drips on the backside where you can't reach, as well as on the inside. Radiators lose some efficiency once they are painted. The proper way to restore it would be to disconnect it, and bring it to a shop that can blast off the remaining paint ...


I have used a wire-wheel on an electric drill to remove loose paint and rust from a radiator. It can be hard work but you can get down to bright clean steel using those tools. Your case looks extreme but I would try that to judge the effectiveness. I would aim to remove all traces of rust. If there is too much rust for this to be practical, that might be a ...

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