12-17-2020, 03:31 AM
What I do with chassis rust spots is to treat them with phosphoric acid, which I have in both a cleaning product I found, and in a type of rust remover. In any event it seems to prevent the steel from rusting again, I guess by converting the iron into iron phosphate, they call it pickling I think. The rust remover was called "Removall" but I don't think you can get it anymore, it would turn the steel grey after the rust was removed, unless you polish it afterward.
Regards
Arran
Regards
Arran