One of the tricks to clean rusty tools and saws were to smear them in the very cheapest ketchup. The cheapest ketchup has a very high vinegar content.
If anything does survive that, then electrolysis using a 12v battery charger.
@lynx started
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One of the tricks to clean rusty tools and saws were to smear them in the very cheapest ketchup. The cheapest ketchup has a very high vinegar content.
If anything does survive that, then electrolysis using a 12v battery charger.