I have a small area on the firewall of my 51 3100 that I repaired and want to paint with a Preval sprayer. I purchased a quart of the Forester Green acrylic enamel paint from Jim Carter to see how it matched up to the original paint on my firewall. I had a shop use some of that paint on a front splash apron (my truck was missing the splash apron) and the match was great! So now I want to use that same paint that is leftover on my firewall project but I dont know squat about painting. My questions: What primer should I use under acrylic enamel, and how do I dilute the paint before I put into the sprayer?

Thanks from ignorance-central!