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. Sometimes by looking at other people's works you can get past your creative block and start creating your own airbrush art again. Any form of art will work to give you inspiration since after all you can airbrush any design you see. Take the time to look at the art in the books and see them as your own. In their starter kit they include 2 single action ABA airbrushes, 2 hoses, 9 glass airbrush bottles, a 2 outlet air manifold, 7 60ml airbrush tattoo ink in red, blue ,white, yellow violet, fuchsia and green and the kit includes a 120ml of black airbrush tattoo ink. The starter kit also give you 50 Vynalaser stencils that can be reused over and over again. It does not matter if you can draw or not. There is no need to be able to free hand you art work either. Stencils can be used to airbrush art on to your automobile just the same as any other surface or project. The art that you create with airbrushing is only limited to your own imagination. There are plenty of places to acquire stencils or get design ideas so that you can create your own stencils. If you purchase the see through folders then you can use these for stencils even if you are limited to tracing your design onto the plastic folder prior to cutting it into a stencil for your airbrush art. No matter what material you go with make sure that you remember to cut out your areas slowly. By taking your time you can make sure that everything matches up the way it should. 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. Another great thing with using airbrush art to create tattoos over real tattoos, is that there is no risk of infection due to piercing of the skin with a needle.