I had a thread asking this question and it got some traction with answers from people who use this equipment a lot. If you look up my threads you can find it easily- sorry I cannot post link from my phone easily.
I ended ip purchasing a DevilBiss spot repair gun (HVLP and a compliant). The pro guns are expensive and some people claim they get great performance from cheaper options. I dont doubt that, and I ended up with the spot repair gun because its an extremely high quality gun thats designed to shoot smaller surfaces- for me, I use a commercial 30 gal compressor with an aftercooler and I was able to spray a playfield and full lower cabinet without running out of air. The spot repair guns use a bit less air than a full.
I can share exact details on what I got where etc... just ask and I will look it up and post. If you can swing it- I would HIGHLY recommend getting the DeKups system (3M makes a similar) for your gun. It makes mixing, spraying, gun clean up, and disposal trivial and a joy. Also- you can get cup sizes that work for pinball- you can mix 3-6 0z of clear and fill the cup and get a great feed with almost nothing waste.