I've bought washing soda at regular supermarkets, including Safeway &
Superfresh, as well as local (to Baltimore) smaller stores. Electrolysis
is probably worth trying just for the good cleanup results if nothing
else, but I'd have my doubts about it freeing up a
seized screw like that. Have you tried heating the nut or female
threaded portion of the vise?


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Larry Wasserman Baltimore, Maryland