Airbrushing the artwork on took a lot of time out of painting the vehicles over doing the designs by hand. Thus airbrush art was being experimented with on vehicles at this point. The way we use airbrushing now to create art surly has come along way from the primitive methods used by our ancestors and even our parents. This refers to how the airbrush functions. With single action only the air is controlled with the trigger. The trigger will control the air and the amount of paint that comes out is determined by the needle adjustment on the back of the airbrush handle. Dual action is when the trigger on the airbrush controls both the air and paint. Most experienced airbrush artists will actually take their handle off so that they can deal with clogging issues without delay. So the choice is yours as to whether or not you want the handle on or off of your airbrush while you are creating airbrush art. Pay special attention to the threads on your airbrush. If you purchase the see through folders then you can use these for stencils even if you are limited to tracing your design onto the plastic folder prior to cutting it into a stencil for your airbrush art. No matter what material you go with make sure that you remember to cut out your areas slowly. By taking your time you can make sure that everything matches up the way it should. 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. When you are feeling the creative block coming on then start looking around you. Anything can be a basis for inspiration, especially if you change your scenery and look around your new surroundings with open eyes. Cooped up in a studio too long, then go out to the park and open your eyes to everything that you see.