There are actually two reasons for the base coat. This base coat will help protect the nail from the paint and help the paint to adhere to the nail better. Metal should be wet sanded to give a rough grainy effect. This rough grainy effect will help the paint to adhere to the metal. With metal actually being smooth the paint will have a hard time sticking to the smooth surface. The book will give step-by-step instructions on the basic level of airbrushing techniques and how to create different effects with your airbrush art. By reading this book you will learn about the equipment and other materials that you will be using. The effects that you will learn about include freehand, edge effects, highlights, lettering and several others. The great thing is that the foundation is light weight and barely noticeable. Airbrush makeup has been able to take a woman that is plain and turn her into an exotic beauty with the right application of certain makeup. The effects of airbrushed makeup are more natural but at the same time more dramatic than the use of regular make up. Your work will be put up there for the sites traffic to see and thus getting you known in the industry. Take the time to submit several pictures of your work to several website airbrush art galleries. Don't depend on just a couple of pictures on one or two sites to get you known. Myspace is also a great way to get seen and gain some exposure. 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. When doing airbrush art in the form of body art or tattoos you can use paint that is usually termed in two ways. Usually this paint is referred to as body art paint or airbrush tattoo ink. Both forms are basically the same and maintain a realistic tattoo look. This paint will last and is waterproof. To remove you will either just let time take its course and the tattoo fade or rub with baby oil to remove.