Re: Removing oxidation from NOS radiator core
When I worked at a radiator shop in the 70’s, we would use Muratic acid to clean the inside of the radiators before I painted them. It got them shiny as new on the inside, If any got on the outside it would do the same.
Just don’t leave them more than a few seconds if using pure acid. A watered down batch would work better I think.
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