(1) After mixing, reducing etc and ready to shoot your first coat, mask about 4' of 18" solvent proof masking paper to a flat horizontal surface (shop wall, door or even dust free plywood). Make your final gun adjustments on a corner of that paper, and finally make one long, even pass on the same paper....and then proceed to paint your project with the first flash coat. (2) Set your gun down, disconnect air hose and leave your booth. Force yourself to stay away at least 15 minutes (@ 72°). (3) Re-enter and stick your finger on the paper...you're checking to see if the material is wet, stringy or tacky like the back of masking tape...which is the ideal time to re-coat the project. (4) And very important, Make Another Single Pass on the same piece of paper before you proceed to your project.
Repeat as necessary.
Folks, I tried to pass the wisdom, which I learned from the grand master, to all of my students at the beginning of each I-CAR class...It does indeed add on more step to the painting cycle...but it may very well be the last agonizing and frustrating 'run' you ever have.
God I love talking paint

......sure hope I'm not boaring anyone.