I'm stripping most of the paint off of my 66 Tempest (surface rust) and have two questions about prep. Planning on using phosporic acid to deal with the rust, but what's next? Do I need to neutralize it, or would wiping it down with mineral spirits be enough?

Also, I have six rattle cans of Tremclad gray primer and I really can't see a downside in using them as a base - can anybody think of a reason not to?