Yep, I understand that, I'll knock off some of the really bad stuff but like I said it's at the point (before I bought it) it's too rusty to fix "properly", so I'm cleaning and bondoing the holes on the outside, but I just want to convert the rust underneath so I can rubber coat it.
It'll never be a daily driver again, it's just going to be a barely street legal toy, since I can't haul it, so I can live with it if it's not perfect, I just wanted to make it last as long as possible.
I'm thinking either a tannic acid or phosphoric acid based converter, I was just looking for opinions, recommendations, and "avoid...".
Sorry didn't mean to high jack the thread.