I’m an old school body man from the 70s-80s. The shops in my area were just starting to use the modern systems when I got out of the business. I’ve bought new HVLP spray guns and all the modern supplies for my current project. The problem I’ve been having is alot of orange peel. Almost a textured finish. I’m mixing everything according to package directions and going by the spraying procedures. I spray between 30 and 40 PSI from an 80 gallon 5.5 HP. 2 stage compressor . In the old days I would just thin the paint more, but I’m not sure what procedures to use with these modern paints.