Difference in paint single and 2 stage
If you are doing a solid color single stage is a good way to go. Alot of your black high end cars are single stage. I work for a PPG jobber, we have a really nice single stage urethane, "Delfleet Essential" that is very easy to apply, good coverage, even yellows and greens, and affordably priced.
A sprayable gallon of black sells for $80+tax.... Can't buy a gallon of cheap acrylic enamel for that!!!!!!! It is available in metallics, but I would go base/clears for that... Either system can be wetsanded and buffed to a show car finish..
Bob
Bob