Paint issues

i would keep in mind all the things mentioned, then practice on some scrap fenders or what ever. experiement with the pressure, volume, and spray pattern, use a slow reducer, be sure the metal is not hot, keep in mind humidity
back when.... i had a guy that did some of my cars, in summer, he wanted a real slow reducer, and he liked to paint when it was rainey! acrylic enamel went on with a real wet shiney look, but he was a master.