An airbrush system does take longer to spray with (approx 15/20 mins for a full body if it's the one I'm thinking of! Then the client needs to stand to dry off after) compared to hvlp units that are widely used now, a lot of hvlp units can spray a full body in 5/10 mins as you can work faster than airbrushing & they usually have a heat setting that dries the solution. I've not used an airbrush system for about 8/9 years (it was a Sudo one). Personally I prefer a hvlp unit for speed, I currently use my Fakebake machine which has a heat setting. X