Rex B wrote:

Electrolytic Rust Removal - Bought a Craftsman 618 parts lathe that's
a prime candidate for rust removal. I went to HD and a supermarket in
search of washing soda, sodium carbonate, but all I got was quizzical
facial expressions from the help. So ....where do you get that stuff?

You can buy sodium carbonate or washing soda in large quantities (a
pound or so)
for swimming pool use. Any place that has swimming pool supplies should
have it.

Jon