Painting any car requires consistent pressure that delivers the same amount of fluid each time. This consistency is achieved with any premium spray paint gun. Therefore, it is recommended to go big in terms of gallon and compressor capacity. In PSI, this means around 90 PSI and around 14-18 CFM or Cubic Feet Per Minute. This can be achieved by purchasing a sizable 60-gallon tank with a 6-horsepower compressor.