Being able to do micro airbrushing will allow for the artist to create a more realistic and more in depth detail on all small areas of their airbrush design. It is in these small areas that a lot of artist miss the chance to really define the details because they are unable to fully create the detailed area. Different airbrush art calls for different psi on your compressor. 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. This kit will run you around $994 where as the items purchased individually would run you around $1,242. 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. 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. The only thing you need to be doing is experimenting with the airbrush. Get used to how it works and feels in your hand. Practice spraying the airbrush at your cheap surface while you learn just what pressure is needed where. The internal mix is when the air and the paint both mix inside of the airbrush. This will create a atomized fine dot spray pattern. 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. Beej Curtis instructs on airbrush art in 1 and 2 day classes covering different aspects of airbrush art. Beej Curtis also offers private 1 on 1 lessons for anyone wanting to learn in a more private setting. The private lessons are 3 day classes that will take you from beginner to advanced airbrush art techniques.