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. This is a major amount of time saved for the artist as well as the recipient that must stay still during this process. All water based paints can be cleaned with water or a commercial cleaner designed for airbrushes. Windex is useful when cleaner your airbrush between color changes while using your airbrush. Never soak or leave your airbrush exposed to Windex for any real length of time. You should not have to take your airbrush apart every night to clean it, it is alright to only do a complete break down and cleaning once a month. Airbrush models come with either a solid handle or a handle with an opening. The purpose of this opening is so that you can adjust the needle without removing the handle in a single action airbrush. Most experienced airbrush artists will actually take their handle off so that they can deal with clogging issues without delay. 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. While the book will teach you some intricate designs do not worry though cause the book, also has some simple projects that you can start with when working with airbrushing motorcycles and cars. If you are at an intermediate level with airbrush art then The Ultimate Airbrush Handbook by Pamela Shanteau is for you. 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.