Thanks so much for asking. I was wondering the same thing. Short of dusting over it with icing sugar or cocoa...do you use an airbrush or something? ← The detail in the stencils is very fine and you can use almost anything to pass through them i.e royal icing, butter cream, cocoa pastes, fondants etc. You just have to be sure that the surface of the item to be decorated is dry enough to accept the use of a spatula. But yes, you can also use an airbrush. The company will also do custom work - they also offer a "how to" package with a DVD, book and sample stencils.