I work with chocolate a lot and I also have an airbrush but Ive never used the two together… in fact I havent really used it a huge amount since my initial attempt when I found that the colour just never dried and ‘bled’ or smeared into everything I iced on top which kinda gave disappointing results. I managed to bluff my way out of it and have unsuccessfully experimented several times since but find I’m happier (and my bake area is less rainbow-ed) simply painting (or sponging) onto chocolate.
I hate fondant with a vengeance; it tastes like chewing gum and is torture to work with so I now roll and panel modelling choc instead which tastes and works divinely. (Big thanks to Liz Marek here). It aint white.. but what the hey. Small issue. I paint it with paste (sugarflair or pme) mixed with vodka cos you cant buy the American food grade high % ethanol stuff which dries in an instant here- its illegal.
I did some research re airbrushing choc; I gather you can purchase paints specifically made for the purpose but I have heard they block yer pen like earwax. The pens arent cheap either. I bought a baby elephant compressor with a Iwata neo gravity feed airbrush and unless you intend to use it every day all day I’m guessing this would be more than adequate. I didnt pay a fortune; I’m equally budget conscious and it was a lot cheaper than the dinky doodle or cassie brown kits.
I got a set of Kroma colours with my elephant which you need to be aware dont appear to be uk friendly but sure are bright!! I would say that using an *oil *based paste mixed with vodka would be your best bet- this is what I paint with but I warn you it takes ages to dry so very thin / fine layers is the thing. We dont have the products available to us here that they have in USA so dont expect to reproduce what you see coming out of other countries who dont have such strict regulations as us. Its disappointing but fact. My rainbow cakes are crap compared to what I see USA bakers can make… (mind- some use packet cake mix…no comment)
Hope this helps; good luck with your airbrushing and buying etc and have mega fun with the chocolate!! Try not to eat it all (like wot I do…)
:-D
Incidentally glutenfree cakage...