Greg,
(slight hijack)
the tank got scraped (IH8UNDERCOATING), wire-wheeled, sanded, Rustmort'd, self-etching primer, then three coats of ZeroRust. If done over, I'd pass on the ZeroRust. I wasn't very impressed with how long it took to harden (the POR-15 on my frame was harder in 4 hours than the ZeroRust after a few months), and still never approached POR for durability. Oh well, chalk this one up for experience.
Next time:
I'd be interested to try the POR Metal Prep to compare with the RustMort. I'd use POR again (very worthwhile even considering the price difference between tremclad, etc), but would also like to try RustBullet (looks worthy of a test).
Norcal, I'm still jealeous of your '83 (the last two years of production got all the goodies!). Once you get the tank issue fixed, it'll be play-time again.
Cheers,
Steve