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. Damage to the air cap and head assembly will effect the performance of your airbrush. Depending on the type of airbrush art you are doing will determine the type of airbrush that you need. When doing airbrush art on nails go with either the Iwata HP-A or the Iwata HP-B. These are great for airbrushing nails. Even if you do not go with the Iwata though remember to always go with named brand and never use any knockoff airbrushes. 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. 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. Automobiles and motorcycles are another areas where airbrush artists can get creative and create masterpieces. Many artist are making a name for themselves with custom airbrushing art onto automobiles and motorcycles. The cost for this art is expensive and you can cut your costs down by learning how to do it yourself. When you are feeling the creative block coming on then start looking around you. Anything can be a basis for inspiration, especially if you change your scenery and look around your new surroundings with open eyes. Cooped up in a studio too long, then go out to the park and open your eyes to everything that you see. Place the tip within the pliers and gently try and straighten it back out. Remember to do this gently so that you do not break your needle. The better care that you take of your airbrush the longer it will last. So keep your airbrush clean with the right cleaners and once a month do a full break down and cleaning.