A good Anti rust spray?

I am helping a friend restore his 56 Studebaker Power Hawk. The body shell is on a rotisserie now and completely down to bare metal using a Dustless Blaster. We used this Bill Hirsh product. It is very reasonably priced, and sprays on easily with a 'Windex' type spray bottle. It is working quite well.
Non-Flammable Rust Inhibitor | Rust Inhibitor for Cars-hirschauto.com