Simple techniques will give you a better understanding of the process and allow for you to have a foundation in which to build on. When you first try using an airbrush you need to use a cheap surface that you can just practice with. A simple black paint with work for this. No need to buy additional colors. Removing the needle cap is fine but should you hit your airbrush against something or drop it you could end up damaging the needle itself. So to take care of your airbrush make sure that when you are not using your airbrush that you replace the needle cap back onto it. This will give a little protection to the needle itself should the airbrush happen to fall. 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. Now that you are ready to begin airbrushing the tattoo on, you need to take your time and be careful of what you are doing. There are no rooms for mistakes with airbrushing on a person's skin. So take your time to ensure you don't make a mistake on a person's body with the airbrush paint. While experienced artists understand this, again a beginner may not. Show some pictures of your work and tell your audience how you created that design. Talk about the paints that you use, the types of airbrushes and so on and so forth. By discussing your techniques and sharing your insight you will show your audience that you are an artist that knows what they are doing. Airbrush2: Concepts for the Advanced Artist by Radu Vero will help to teach the experienced artist more advanced techniques. By learning these advanced techniques the artist can start to create even more complex airbrush art. After all in the world of art there is always room to learn more and advance one's way of doing something to create a whole new aspect for the current art.