My friend Karen Hill who owns Wedding Cake Art teaches this technique. http://weddingcakeart.com.au/
It is so easy to do with an air brush but it it can be done dry brushed. The secret is to layer the colors. You will need some Lustre Pigments . Make sure you keep your machine's tip clean and clear of blockages with liquid cleaner . Make sure you are in a well ventilated room.
