When doing airbrush art on skin make sure you are using airbrush paint that is designed for the skin. Usually this will be sold as airbrush body paint or airbrush temporary tattoo ink. These are the only types of airbrush paints that are safe to use on the human skin. These paints will have a hard time staying on skin that is oily. The paint can be automotive paint but make sure that you use a well ventilated area as the fumes can pose a health hazard. It is best when using automotive paint to wear a respirator at all times. 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 that you will use when doing airbrush art on nails is water based. A bottom coat and a top coat are what protects the water based paint from being damaged. You will also need to spray a light coat of what is called varnish between the artwork and the top coat. Varnish is just a water based clear coat that will protect the paint from getting brush strokes when you apply the top coat. 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. Any damage to your needle can cause very bad paint spray patterns. It is important to keep your needle from getting bend and either straightening the needle or replacing the needle. The air cap and head assembly are on the front of your airbrush and they cover the tip of the needle. The purpose of these parts is to control atomization of the paint spray. First off you will need an airbrush gun, 10' Hoses braded hose, stencils, glass airbrush bottles and an air manifold. 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.