Metal should be wet sanded to give a rough grainy effect. This rough grainy effect will help the paint to adhere to the metal. With metal actually being smooth the paint will have a hard time sticking to the smooth surface. This is why it is important to wet sand the metal first. A base coat should be applied to the metal before any airbrush art design is started. Motorcycles and building murals are also a target for an artist to show off their creativity with airbrush art. The history of airbrush art is just as fascinating as the creative designs that artists are using airbrushing for. Experts believe that a primitive form of airbrush art was used by ancient civilizations. Airbrush art can also be applied to the body to create temporary tattoos and thus uses the human body as a canvas for an artist's imagination. Cigarette lighters are also being used as a way for artist to show of their airbrush art. The once simple looking lighter is now a display item with awesome art on it. This makes the internal mix a good choice for fine detailed work in your airbrush art. The point at which they come together is in the head assembly. The external mix is where the air and paint come together outside of the head assembly or the fluid assembly. These airbrushes create a large dot pattern. 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. A tattoo artist will rub alcohol on a person's skin to kill clean and kill germs prior to beginning to start a tattoo. In this case you are still going to use the alcohol but for airbrush tattoos it is to get rid of the oil on the skin and not to sanitize an area for a needle. 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.