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. If you purchase the see through folders then you can use these for stencils even if you are limited to tracing your design onto the plastic folder prior to cutting it into a stencil for your airbrush art. Airbrush art goes on quickly thus saving lots of time compared to henna as well as airbrush art is waterproof. Unlike henna lots of exposure to water still will not fade your tattoo. Where it would take an artist 6 hours to pain on a large henna design the same artist could airbrush the design on in around 30 minutes. Airbrush art is one way to take something and turn it into a master piece. Over hand painted art, airbrush art can be done in less time but with the same great effects if not better. There is more that you can do with airbrushing that you can not do with hand painting. You can take airbrushing and create a beautiful mural on a concrete wall to turn that once bland wall into a work of art worthy of some attention. Shanteau offers visual DVD and vhs tapes to help other learn how to create airbrush art on automotives and motorcycles. These videos show you step by step exactly how to do certain techniques to create specific looks. Her series teaches about airbrushing flames, murals and masking techniques and motorcycle gas taking airbrushing. 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. Continue to practice with shapes until you are able to perfectly render airbrushed shapes. Once you have the ability to render the shapes, you can move on to rendering shapes in different textures. This means that you should work on creating shapes with thin lines and shapes with thick lines. This will help you to learn more how to use the airbrush to render broad designs as well as fine detail.