Nice work! Getting a good bond is the most difficult part of this job and it appears you did the necessary steps to get it.
FWIW, I do a lot of painting for a living. I have all the gear and have painted a few vehicles, both with an airless and with air driven paints. An airless will give good results if tip selection and experience is at hand. I used Sherwin Williams paint products on my aluminum sided trailer and the paint job results were very good.
One suggestion I would offer is to lay on an accent stripe/stripes or a hand-painted pin-stripe. It adds a certain touch of class to the job. I used spray cans and masked off the body to accomplish it.
BTW, that spray booth is over the top. There are not that many guys that would go to the trouble of building that. Hats off for the big efforts of doing that!