[SAJ]

Ronn, almost all acetates are soluble in water, so the iron/vinegar reaction compound will dissolve in the vinegar and any residuals rinse off with water. You then have a "nascent" iron surface which will rust very quickly. So a great thing to do is paint the de-rusted surface with phosphoric acid, or a rust preventive based on Phosphoric acid like Ospho. This forms a skin of iron phosphate, insoluble in water unlike iron acetate, and a great surface for painting, powder coating etc. Even better is to wait for the"nascent" surface to flash-rust, then phosphate it with Ospho etc, since iron oxide rust reacts quicker to form a thicker iron phosphate film than raw iron does .
"Nascent" literally means "at birth"
Apologies if you already know all this!
SAJ in NZ