In a single action airbrush the trigger controls the air flow. In a dual action airbrush the trigger controls both the air flow and the paint flow. Beginners should really take the time to practice on how the trigger works so that they can perfect their ability to airbrush. Your airbrush will have a back lever as well that acts to shut off the air flow and paint flow when the trigger is released. The kit runs around $544 where as individually purchased these items would cost you around $639. For those of you who have experience in airbrush art tattoos and want a kit that will allow you to open up your own business doing airbrush art tattoos professionally, Airbrush Bodyart has you covered. They offer the Airbrush Volume Parlor 2000 kit. Professional Airbrush Techniques by Vince Goodeve will teach you some pretty intricate designs. This book will help you learn how to prepare metal surfaces so that you can begin to learn or advance with airbrush art on motorcycles and cars. While the book will teach you some intricate designs do not worry though cause the book, also has some simple projects that you can start with when working with airbrushing motorcycles and cars. All you need to know how to do is successfully use the stencil that you wish to use for your design. The main key is learning how to control the airbrush gun so that you can get the paint only where you want it and not overcast the paint where you do not want it. Once you master that then your options are endless with the vast array of stencils out there. So make sure that you have washed and fully dried your material before you begin. Leather needs to be wiped down with rubbing alcohol prior to doing any airbrushing. This will remove the oil that is on the leather. The oil will prevent the paint from sticking to the surface. Make sure that all the leather has been wiped down and that the alcohol has dried before beginning. You will need a air compressor that is designed for airbrushing on nails. The best air compressor to use is the Iwata Studios Series Silver Jet Air Compressor. While this one is the best one you can go with any small compressor that has an 18 psi. Preferably get an air compressor that will adjust between 10-18 psi if you do not go with the Iwata Silver Jet.