Damage to the air cap and head assembly will effect the performance of your airbrush. Thus like the needle you will be unable to create desirable airbrush art. 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. When it comes to any part of your actual airbrush equipment such as the airbrush and its parts as well as the compressor make sure to go with name brand. Do not use any knock offs a these will cost you more money and lots of headaches in the long run. You get what you pay for and when it comes to airbrush art you need to go with names that you can trust. Once you have a couple of post up telling about yourself and showing off some of your work then you are ready to get your blog seen by the world. Some blog sites such as Shout Post and Tblog actually show your blog posts off for you to other bloggers. This helps to get your blog some traffic. If you choose a blog host that does not do that then you should look into some blog traffic exchanges. If you want to use a more durable material to create your stencils you can use the plastic pocket folders. These can be picked up rather cheaply from the store in the office supply section or hit the back to school supplies. You will need an exacto knife to cut your design out. Depending on the size of your stencil you can probably create more than one stencil from this plastic folder. But as long as your project is made from the above material you can use water soluble acrylics for your airbrush art designs. Depending on which brand of acrylic paint that you go with, you may need to thin it down so that it flows freely through the airbrush. Also some acrylic paints require that they be heat set if used on clothing. Learn some tricks on how to create great airbrush art tattoos. This video will walk you through it all step-by-step so that you really understand the process behind airbrush art tattoos. If creating custom airbrushed t-shirts seems to be your interest but you have no experience in airbrush art then Kent Lind has the video for you.