Hi all air brushers!

I need help with air brush machines. I have just begun cake decorating, and so I'm not doing very many cakes right now. So, I need something that is smaller and not too expensive. What brands are out there and what have you had success/failure with???

Also, on Amazing Wedding Cakes, Christopher Garren's Cakes was using an aresol type paint can that wasn't an air brush machine (and it wasn't the Wilton stuff). It looked like there was a paint canister in the bottom of the areosal bottle. I have looked online everywhere and haven't found anything like it...what was that??? - I tried emailing them, but no one has answered me back - go figure!

Thanks for all your tips/advice!!