The auto paint store I use would mix up PPG in a can for you. It was not cheap. Yet it was the same as you would mix up yourself. Had to sign a waver saying it was good for 36 hours. I used to heat the can in warm water before spraying. Shake well, when you think it is good, shake for another couple minutes. lay wet coats but light enough to not run. Hard to do. First couple times I had drips every where.
Buzz.