When I want real good paint on something, I always buff it out. Otherwise to get great paint like on a car you really need a clean room, wet floor, all that stuff. Failing that set up, anybody could get a great paint job with lacquer and elbow grease. 1200-1600 wetsand then damp rubbing compound, wet rubbing compound, then polish. Did airplane wings like that one time. Spent some time spot repairing acrylics the same way. I'm still amazed at guys who can spray with no sags or dusting, that's experience though. Knowing your thinner/kicker speeds, ambient air and all that.