I'm an aircraft mechanic, I typically only do touch up painting though. The criteria the paint must meet varies by the airframe manufacturer and is called out in the aircraft maintenance manual under the approved materials listing.
At work we only use one type of primer on all aircraft and that is PPG aerospace " super koropon" fluid resistant epoxy primer. There are other primers approved, but not commonly found for whatever reason. The color coat however varies based on the aircraft's owner but 90% of them use Sherwin-Williams jetglo, the rest use a variety of DuPont and ppg products.