Clear coat can be sprayed on with either system. You will have to pay more attention to keeping the water out of the line with a compressor based system. But once you figure out the right method no real issues. Having both I just find that I can spray easier and with less hassle with the Turbine type HVLP. As long as you are sanding and polishing almost any method will be fine (assuming no contaminant in the paint). Simply sand flat and go to finer grits and compounds and voila
Back in the early 80's when I had little money I bought a Miller compressor spray gun outfit. $40 something for the compressor (more like a piston style aquarium pump) with no tank, just a continuous flow, and a couple of guns for that price I sprayed acrylic lacquer on a model plane, and cleared it. Looked OK but not great. Sanded flat with 600 rubbed it out with fine rubbing compound (green can) and polished with Liquid Ebony (no longer available) Lacquer doesn't polish like the new paints it burnishes, the rubbed off lacquer in your cloth burnishes the finish which is why you only had to sand to 600. Finish was as good as any 2 part clear coat today. Not as tough or fuel proof but just as pretty.
Still have one of those planes today
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And this was the first one I ever spray painted. Weighed a ton though, too much paint
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