Never feel like a "DA" if you get a run! Its called a flow indicator.
I like the Roller idea!
Here is what i consider a wet paint job.
I had two coats of base sprayed at 78 degrees and let the last coat set one hour and did my mil checking so I could check my mils of clear when done.
I used HS clear and raised temp to 82 degrees while shooting.
It took 30 minutes to apply the three coats of clear and fixing the run.
Set booth at 115 for 20 minutes and when got back from lunch we milled the car. Average clear mil was 8.8-9.2 pretty consistent but where the run was left front bezel (inside) on the car in my picture (except pink) it was 12-13 mils.
No doubt it was user error! (incompetent gun control) Hey they don't make those sata RP's like they use to?