Being igmo about Cans, and wanting to paint the Deuce over, all the Bodywork's done, I want to use a can and spray relativly thick, as opposed to thined out paint. With a Lowes (less than $100) can, what tip am I wanting to use, to be able to push the paint and apply as thick as practical, ie. the original re-paint look on most MV's where it almost looks brushed on
A 1.7, 1.8, or a 1.9mm diameter tip will work.
Depending on the type of spray gun purchased, gravity feed, pressure feed or suction feed, will dictate just how much paint you gun will be able to atomize.
I can't speak for application of Gillespie, but CARC from Hentzen, or Sherwin Williams in the single component flavor of Mil-Dtl-53039 is fairly thick right from the container measuring 30-35 seconds using a #4 Ford viscosity cup.
If you really want that heavy spattered look, crank up the air pressure on the gun, back the needle out until when fully open there is no drag on the trigger, move the spray gun back 12-15 inches from the part and move like hell.
Not my idea of a paint job that I would be proud of, but to each his or her own.