The powder helps to keep the tattoo from fading. The 70 percent alcohol is to clean the airbrush gun and glass bottles with after you are done. Airbrushed art used to create tattoos will last for 7 days on the norm. Now if you have extremely oily skin it could start to fade in a couple of days. If you have dry skin it could last past the 7 days. A person with dry skin will get more than 7 days usually from the tattoo. It does not matter though if they have dry or oily skin you should apply talc powder as soon as the airbrush art tattoo dries. Airbrush tattoos do cost money and customers are not going to spend that money if their tattoo does not last for at least close to what is expected. 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. In a single action airbrush the trigger controls the air flow. In a dual action airbrush the trigger controls both the air flow and the paint flow. These can be picked up cheaply in office supply areas of most stores. When doing airbrush art there are different types of airbrushes that are available. The best airbrush to use for putting airbrush art onto an automobile is a gravity fed airbrush. This is the one that professionals use and will give your artwork a high quality look. How to Airbrush T-shirts and Other Clothing by Diana Martin is good for beginners or can be used by the more experience airbrush artist who wants to learn the techniques used for airbrushing textiles. This book contains information on all the equipment, materials and techniques needed to create airbrush art on textiles. In their starter kit they include 2 single action ABA airbrushes, 2 hoses, 9 glass airbrush bottles, a 2 outlet air manifold, 7 60ml airbrush tattoo ink in red, blue ,white, yellow violet, fuchsia and green and the kit includes a 120ml of black airbrush tattoo ink. The starter kit also give you 50 Vynalaser stencils that can be reused over and over again.