On a slightly tangential topic, some of of the electrolysis rust remover web sites mention using a "passivator" after rust removal to prevent rapid re-oxidation.
Has anybody used this additional step? I believe it is a mild phosphoric acid. The claim is that it prevents the rapid re rusting that you will get even minutes after the electrolyte bath and promote paint adhesion if you are going to repaint.
Two specific products that were mentioned were "Jasco Metal Prep" and "Ospho"
I used naval jelly and Acid 8 primer on mine. Naval jelly is mild phosphoric I believe.