The powder helps to keep the tattoo from fading. The 70 percent alcohol is to clean the airbrush gun and glass bottles with after you are done. Airbrushed art used to create tattoos will last for 7 days on the norm. Now if you have extremely oily skin it could start to fade in a couple of days. If you have dry skin it could last past the 7 days. Airbrush Art On Nails Almost everyone loves some for of art or another. A lot of women love to get their nails manicured. So why not combine the two together? Well that is exactly what has happened. Airbrush art has combined with the manicure to give women great opportunities to use their nails to show off great artwork. You can take airbrushing and create a beautiful mural on a concrete wall to turn that once bland wall into a work of art worthy of some attention. While you can do this by hand the time factor makes airbrushing a better choice. 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. 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. Larger airbrushed areas are better done with the external mix. Since with the larger dot pattern you are able to spray more areas in less time. Airbrushes also come in single and dual action. 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. Should these parts become dented or damaged in anyway you should replace them immediately. The other way is that you can freehand the design onto your project without the use of stencils or masks. Most stencils and masks that you purchase are reusable. The stencils are made from different material depending on what the stencil will be used for. But no matter what material your stencils are made from they all have to things in common.