It is important to keep your needle from getting bend and either straightening the needle or replacing the needle. The air cap and head assembly are on the front of your airbrush and they cover the tip of the needle. The purpose of these parts is to control atomization of the paint spray. Should these parts become dented or damaged in anyway you should replace them immediately. The video features Air Brush Action's Teacher of the Year for 1995, Debbie Eastlack. Paasche a name brand in airbrushes and airbrush accessories offers up an exceptional video titled PAASCHE Airbrushing with the VL. This video is offered on DVD and runs about 30 minutes. This video deals with teaching the beginner all about double action airbrushes. 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 best airbrush to use for putting airbrush art onto an automobile is a gravity fed airbrush. Professional Airbrush Techniques by Vince Goodeve will teach you some pretty intricate designs. This book will help you learn how to prepare metal surfaces so that you can begin to learn or advance with airbrush art on motorcycles and cars. 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. Henna as temporary body art does last for awhile requiring time and lots of exposure to water to fade and disappear. Henna though takes a long time to hand paint onto the body. The bigger the artwork the longer it will take the artist to pain the henna design on. Airbrush art goes on quickly thus saving lots of time compared to henna as well as airbrush art is waterproof. These paints clean up with water while they are still wet. So if you do get any on the skin or another surface where not needed then clean up immediately while it is still wet. The paint will become permanent when it dries. There are a lot of possibilities with acrylic nail art paint that you can do when creating your airbrush art.