i sprayed my 71 mustang with rustoleum primer with hvlp gun. got a lot of runs not sure if the presure on gun was to high or my mix primer+ mineral spirits was wrong.( i painted my dodge dart and few other cars before and never got so many runs)
now i need to sand it down and get ready to spray top coat( sunburts yellow)

so my q. is. what ratio should i use paint/mineral spirits, and what best presure on gun?
thx lukas