I can vouch for the Eastwood products. They are pricey, but they work very well. I can't imagine you could paint a complete frame in just 3 aerosol cans. I would probably stick with the brush on kits, and include the Rust Convereter pre-step if you still wanted to do that.

http://www.eastwoodco.com/shopping/...373&iSubCat=374&iProductID=12251

Instead of just 3 cans of each, you get a quart of Rust Encapsulator, and 2 quarts of Chassis Black. You can also dilute and spray in a gun if you want too.

http://www.1969fb.com/pics/other/54Chevy/