The bottom feed is where the cup is mounted to the bottom of the airbrush and the paint is brought up via a siphon tube. It is for this reason that the bottom feed is also referred to as a siphon feed. Since the artist can attach the cup to the bottom of the airbrush the colors can be changed quickly by using different cups prefilled with the colors needed. A damages needle can be disastrous to your ability to create high quality art, because if you are unable to straighten a bent needle back out or the needle should break completely you will not be able to finish your airbrush art until you can get a replacement. If you do end up bending your needle you can try and straighten it with either pliers. So make sure the paint you are using is safe for the surface you will be putting your airbrush art onto. Water soluble acrylic paints are used for airbrushing art onto plastic, metal, vinyl, wood, ceramics and cloth. This makes this type of paint the choice for airbrushing art onto your model cars or airplanes. This book contains information on all the equipment, materials and techniques needed to create airbrush art on textiles. With 18 step-by-step guides you will be fast on your way to showing off your work on clothing. Professional Airbrush Techniques by Vince Goodeve will teach you some pretty intricate designs. Airbrush art workshops are offered around the world by many expert artists who will show you up close and personal how to create art like a pro. These workshops range from beginners to advanced classes. Each artist and each individual workshop will teach you something new and exciting about the world of airbrush art. Why Airbrush Art Fits For Everyone The thing with airbrush art is that it can be done for just about anything imaginable. Artists have been airbrushing a variety of surfaces for years now. The images they create are just a vast as the surfaces that they are airbrushing them on. This is why airbrush art fits for just about everyone around.