Airbrushing

I've been looking into airbrushing for a while now but I have really been struggling to find good advice. I haven't even seen any books that cover this when working with chocolate and coloured cocoa butter, they all seemed to be aimed at cake decoration and coloured food dyes. 

Whilst there is a fair amount online, most of it seems to be from experimenting hobbyists at home and I'm not sure that they are using the correct equipment or even food safe equipment in some cases! 

Can anyone provide a link to somewhere that has a really in depth guide, or at least a good overview of the technique? 

I'm between kitchen at the moment, for a month or two, so don't have anywhere to get equipment and practise just yet. However it would be great to use this time to brush up on my techniques.

I don't think there is an indepth guide. Most of us just do it or have taken classes. What in particular are you needing help with? Chef Rubber has lots of equipment.

I essentially just need a starting off point. Whilst I'm not able to experiment yet, I want to be in a good starting position when I am ready. I have been looking at various equipment sellers and am still unsure of what benefits a gravity feed gun has over a bottom siphon type. 

Also the mixture used to spray, I have seen a few mentioned in various places, from only coloured cocoa butter to coloured cocoa butter mixed with cocoa butter to a 50/50 mix of coloured cocoa butter and chocolate. I'm just trying to find out a bit more about the process before I begin experimenting.

Some books to get you started. Andrew Shotts and Peter Greweling. They both have some basics. The type of gun is personal preference and size of compressor.

Thanks a lot. I will check those out.

Get yourself one of these, if you work cold 85 F or colder in a 65 F room, you can spray most colored cocoa butters with no prob. If cocoa butter starts getting too thick, get a heat gun and heat the brush. I prefer the open flame one. IF YOU WORK COLD, YOU WILL BE SUCCESSFULL IN GETTIONG SOLID RESULTS ON 3rd or 4 th try.

  http://www.shopchefrubber.com/GREX-1-8-HP-Psi-Type-Mini-Compressor-120V/