I just leave mine "out" on the desktop. Most airbrushed paint, topcoats, Future etc. dries to the touch in few minutes. Dust isn't really a problem, unless it's in the airbrush. I always clean mine out before I paint. Now, when I dip a canopy in Future, I will put an upturned bowl or something similar over the piece. I usually let my models dry at least 24 hours before going to the next step. Some glossy paints might need a little longer, but flat colors dry almost as soon as the spray hits the plastic.