If you are doing a mural on a wood floor then use a hand floor sander. You don't want to mar the wood only remove any rough areas. If the wood has been waxed or has a gloss coat then sanding this will remove this and allow for the paint to stick to the surface. Skin should be cleaned with rubbing alcohol to remove any oils from the skin. One way that an artist can learn how to do micro airbrush art is to obtain a video created just to teach micro airbrushing. AirBrush Action has a video titled Micro Airbrushing that features airbrush artist Robert Benedict. With this video you will be shown how to airbrush 23 skulls onto an area the size of a dime. If you are at an intermediate level with airbrush art then The Ultimate Airbrush Handbook by Pamela Shanteau is for you. This book will show you all about airbrushing everything from t-shirts to home interiors. Almost all surfaces for airbrush art are covered at the intermediate level in this book. Airbrushing nails to airbrushing cars is explained in great detail to help you advance further no matter what surface you like to put your airbrush art on. Automobiles need lots of paint and this will damage paper stencils rather quickly. So stick with plastic or vinyl material for your stencils. A great cheap plastic to use for stencils is thin plastic folders. 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 1960s brought us even closer to what we now know we can do with airbrushing. Airbrush art in the 1960s made its way into the music world. Album covers were done using airbrush art to create the whole hippy style images. The wild psychedelic artwork that was popular with that era were done thanks to the use of airbrushing. When the prep work is done right and the customer understands the care instructions they can get many days of realistic looking artwork on their bodies. With the time and cost of creating great realistic airbrush art tattoos one does not want it to fade within a couple of days. While an experienced airbrush artist may know this a beginner may not, so it is worth mentioning.