When choosing paint several things need to be looked at. Do you want a finish like the factory job, pearls and metallics in it , base / clear coat finish , stuff that changes with the light, enamel type finish , stuff that is easy to spot repair if needed later , will the paint finish suit the vehicle , and most of all how much money can you afford cause paint is expensive these days.
Back in the spring of '76 the paint material for my 58 Impala was 75 bucks total, straight RM enamel. It still shines today like it did then ( see pic 2018 fall ). My 82 Corvette was painted in 1995 with base / clear. It is still holding out pretty good. Between 2012 and 2014 I had my 49 painted in pieces and stages, material cost 3500.00 , Dupont Imron metallic pearl which is extremely tough durable paint but hard to work with ( paint alone was $300/liter ). This last year I just did my 58 Delray in PPG acrylic Urethane single stage , also over 3000 for material. I don't like clear coat, I like the natural look of enamel like when the 58 was new. This new single stage stuff is awesome. It flows nice, can be spot repaired easily , can be polished if wanted to get out any dust ,runs etc . it is very durable too. And it doesn't have that fake shiney clear look that clearcoat has, it just looks natural. The orange shown is straight out of the gun, no polishing , smooth, no orange peel ( ha ha ) .
My #1 choice 2day is the single stage paint for overall ease of working with , results and cost. The company's are all good, PPG , RM ,Dupont, Sherwin Williams . A big part of a job turning out right is the prep and the guy holding the gun. Material is very expensive today so can't afford to screw things up with the prep.
Not showing off , just showing examples .