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. The gravity feed is a top mount cup that uses gravity to pull the paint down into the airbrush. 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. Once you have removed the oil from the area the airbrush art tattoo will stick a lot better. Place the tip within the pliers and gently try and straighten it back out. Remember to do this gently so that you do not break your needle. The better care that you take of your airbrush the longer it will last. So keep your airbrush clean with the right cleaners and once a month do a full break down and cleaning. Also the airbrush paint will get them wet and they can start to tear. You will need to keep the original design so that you can refer back to it. After you have made copies of your traced design start cutting out the areas that you need to cut out. Then place the home made stencil onto your project and begin to airbrush your project. Both the needle, air cap and head assembly can be purchased at almost any craft or hobby shop that sells airbrushes and airbrush parts. The airbrush trigger is what allows you to actually operate the airbrush. In a single action airbrush the trigger controls the air flow. In a dual action airbrush the trigger controls both the air flow and the paint flow. 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.