Dual action is when the trigger on the airbrush controls both the air and paint. The trigger is pressed down for the air and back for the paint. Now when it comes to the feed on the airbrush there are three types of feeds that you can choose from. The type of feed you choose will also depend on what you are doing as well as what you are comfortable working with. These are advanced techniques and will take you as an artist to the next level of airbrush art. Another way an artist can learn micro airbrushing is to work directly with an expert. Take on a workshop that teaches micro airbrushing and you can learn with some hands on projects under the supervision of an expert. Then off course you will need airbrush paints that are designed for the human skin. This is usually referred to as airbrush tattoo ink. To finish up the process you will need talc powder and 70 percent alcohol. The stencils are available in a wide variety of designs thus giving you almost limitless creativity when using airbrush art to create tattoos. One must be sure of their abilities with not only the application of the right makeup but also with use of an airbrush to apply those makeups. Those that apply make up are considered artists and airbrushing on makeup is just another great way that they have found to show off their artistic median. The make up goes on water and has to dry. When using automotive paint make sure that it is thin enough to flow through the airbrush. If the automotive paint that you have chosen does not flow then thin it down so that it flows. The paint should be thinned to about a milk thickness. A good automotive lacquer will work fine to thin down your automotive paint. These videos are created by expert airbrush artists that will show you exactly what you need to know. Air Brush Action offers up a good beginner's video called AirBrush Action Introduction to Airbrush. This video comes on DVD and will help you to learn about airbrush art. You will get 1 hour and 30 minutes of techniques and principles of airbrushing that will apply to all types of airbrush art.