A person with oily skin will only get around a couple of days from their tattoo. There fore you should tell your customers who have oily skin that they need to apply talc powder themselves several times a day to help get the most from their tattoo. A person with dry skin will get more than 7 days usually from the tattoo. A good automotive lacquer will work fine to thin down your automotive paint. Different airbrush art calls for different psi on your compressor. 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. You will save yourself money in the long run when using a name brand versus a generic airbrush. When choosing an airbrush compressor keep in mind that put airbrush art onto t-shirts does require a high psi. The psi setting should be between 40 to 60. Make sure that your compressor is rated for the type of work you are going to be doing. Leather needs to be wiped down with rubbing alcohol prior to doing any airbrushing. This will remove the oil that is on the leather. The oil will prevent the paint from sticking to the surface. Make sure that all the leather has been wiped down and that the alcohol has dried before beginning. When you begin you need to place a base coat of Opaque White first before you begin your actual airbrush design. Airbrush Artist Magazine is a broad spectrum online membership based magazine. The online magazine offers articles, tutorials and videos to help you learn more about airbrush art. The magazine offers unlimited access to all of this with your membership to their online magazine. Airbrush Artists Magazine is updated once a month and aims to offer a minimum of two new lessons, tutorials and articles each month. 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.