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. There are couple of ways that an artist can learn how to do micro airbrush art. One way that an artist can learn how to do micro airbrush art is to obtain a video created just to teach micro airbrushing. AirBrush Action has a video titled Micro Airbrushing that features airbrush artist Robert Benedict. This is a very in depth 30 minute video that will teach a lot to a beginner when it comes to airbrush art. One video that is great for beginners that are interested in airbrush art tattoos is the SHOW OFFS BODY ART How to Airbrush Tattoos. This video is on DVD and runs about 90 minutes. Through this video Donna Nowak will walk you through all aspects from equipment and materials to the application process. After all how can your create great airbrush art if you do not truly understand your airbrush equipment? Take the time to gain knowledge of all the parts of your airbrush will help you to learn how to properly work your airbrush and also how to take care of it. If your airbrush is internal mix then it will have a needle. As you can see using a kit to get you started learning about airbrush art tattoos or to get enough product to start your business is cheaper than purchasing individual items. Of course after you have gotten started the it don't cost as much to replace items as you need them individually. But to get them all at once separately can run a lot, so if you are just starting out needing everything then the kits are you way to go. PSI stands for pounds per square inch and for automotive airbrush art you need a compressor that has a psi of 55-65. Iwata is a great name brand to go with and they offer four compressors that will work for airbrushing automotives. Badger is another good name brand that you can go with. They offer several air compressors that will work when doing airbrush art on automobiles.