I don't know if all you Airbrush users do this already and I'm slow on the uptake but late last night I had finished a cake and was looking at it somewhat dismayed. I needed to remove all the cornflour, something I hate doing at the best of times and especially not late at night. I suddenly thought that I bet this would work with the airbrush. I filled the airbrush with some vodka and tried it on a small spot & Voila! The whole cake cleaned perfectly within a minute or two.
Am so so happy that I had to share!