I guess I should spill the beans.
And I laid down 8 coats, sanding between every two coats, with 800 then 1000. The rattle cans with 25% more for free is what I ordered from Lowes, at $3.77 each. Rustoleum Khaki, which is not offered in the qt or gal (believe me I would have gone that route).
Paint turned out fine, but my sanding imperfections (for getting the old paint off) did not... Couldn't see them that well with the primer (primer laid down poorly from rattle can) the ones I did see I tried skimming with bondo, but in a 110* garage, the bondo dried before I could skim two spots... and added more work because I had to lay it quickly. Even tried mixing it with less catalyst. Oh and I did spray a couple coats of primer with an HVLP sprayer, and it laid down fine, but wayyyy too much overspray with my harbor freight gun. That was the point where I decided against going with automotive paint, btw.
I still can't figure out why people try to barge in on a thread that asks several specific questions, only to be cynical and attempt to convert. If I had a 1972 Mustang Mach 1 that I intended to use as a show car, your G.D. right I'm going to put a proper paint job on the thing. But for a trail rig that will get scratched, beat, chipped and hammered, Rustoleum is a viable option for those who do not have the compressors, sprayers, or knowledge of how to use the equipment. With rattle cans, all you need is masking tape, newspaper, sand paper, a quality respirator (I paid almost as much for the respirator as I did for paint btw!), elbow grease, time, and lower expectations.