I'm in the UK but the idea is the same. It looks as if you have a greasy/dirty, surface that needs a good clean, warm soapy washing up liquid should sufice, and many cold water rinses until clean and dry naturally, taking time.
Starting with primer, I use an auto matt grey rattle can tin, shaken/or sat in a small plastic ice cream tub with a few inches of near boiling water in. Warm to atomise the paint for 5 minutes and then shake as per the can instructions, in this case 2 minutes.
Test spray into the air/spray booth to make sure the nozzle spray is nice and regular.
Spray from 30 cms or 12 inches, just a cover coat, let dry. Another 30 minutes later, just again a light coat leave for an hour or so. If it's covered the surface so in my case I can only see grey, If I'm choosing a light final coat, yellow etc spray on a few light coats of matt white.
I warm the first coat of colour when all primers/undercoats are perfectly dry, and again light coats at a distance gradually building up the colour, how ever many is needed to get as near a glossy coat as needed.
Depending on whether it's a race car or not depends on what /if you want to put on decals and a series of light coats of gloss clear to enhance the shine.
I don't use a an air brush so I don't now about thinning ratio's of paints etc.