Not sure what your paint is like but makes a big difference in the way you spray it on. That video on the guy painting is bull **** as far as I see. If he's using a HVLP gun his air pressure is way to high and your better off slowing down and watching your spray pattern then just throwing the paint around like a wild man. I can go on about that video but I won't .
Cheap paint is going to be a crap finish as far as I'm concerned. Best to use Quality paint and if it was me I'd use DuPont because it is easy to get it to lay down flat.