I've been reading this thread like many others and have been a reader of moparts for years (I have a '70 Challenger R/T). I tried doing this on my Datsun 240Z and so far have enjoyed the results. The paint goes on nice and easy and looks good (I have 6 coats of white so far).
I have noticed on some sections of the car that have 6 total coats and about 2 weeks of drying time that if I dig my nail in, it will scrape right off down to the primer below it. In reading this thread, it sounds like only one other person has that problem, and no solution
Asking the paint guys at Home Depot (whatever that is worth), they told me that Rustoleum isn't made to stick to a urethane based primer, which is what I believe was on my car prior to the painting...
