I want to learn how to use air brushing to decorate cake, somebody know where I can learn or if there is books ... I got the air brashing machine, but I do not know how to use it!!!
Welcome to CC first of all. Why don't you try on youtube. You can learn the basic techniques for airbrushing and apply that to cake decorating.
Start off using some large sheets of butcher paper to practice on, then move on to the cakes.