The air cap and head assembly are on the front of your airbrush and they cover the tip of the needle. The purpose of these parts is to control atomization of the paint spray. Should these parts become dented or damaged in anyway you should replace them immediately. Damage to the air cap and head assembly will effect the performance of your airbrush. Her videos will give you a more visual learning aid than you would get from the detailed directions in her books, so if you learn better from watching then the videos are your best bet when learning from Shanteau. Pamela Shanteau also teaches workshops around the United States that offer a hands on learning experience for airbrush artists. You two can get in on this craze and start you own fun and exciting business offering airbrush art on nails. Airbrush art on the nails is not for the beginner just getting started in airbrushing. The work area is very small and the artist has to have mastered the techniques involved with airbrushing. Making for much more precise content toward a more specific niche. Airbrush Technique Magazine is a broad spectrum magazine that is geared to teach techniques of airbrush art no matter what you are airbrushing. The publication is subscription based and can be obtain with a one year or a two year subscription. Water soluble acrylic paints are used for airbrushing art onto plastic, metal, vinyl, wood, ceramics and cloth. This makes this type of paint the choice for airbrushing art onto your model cars or airplanes. This is also the choice for airbrushing t-shirts as well. But as long as your project is made from the above material you can use water soluble acrylics for your airbrush art designs. Also included in this kit is 1 120gm jar of holographic glitter, 300 Vynalaser stencils that are reusable and a CD-Rom that gives you Flash displays for your customers. 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.