Thus like the needle you will be unable to create desirable airbrush art. Both the needle, air cap and head assembly can be purchased at almost any craft or hobby shop that sells airbrushes and airbrush parts. The airbrush trigger is what allows you to actually operate the airbrush. In a single action airbrush the trigger controls the air flow. The great thing with airbrush art is that you really do not have to know how to draw. All you need to know how to do is successfully use the stencil that you wish to use for your design. The main key is learning how to control the airbrush gun so that you can get the paint only where you want it and not overcast the paint where you do not want it. You can heat set by placing a protect cloth between the design and the iron and ironing the design or you can turn the material inside out and place in the dryer on high heat. If the acrylic does not require heat setting on fabrics then you should still protect the design from fading when washed. To do this place the clothing into a sink of cold water and salt and allow to soak. With needles most artist find that the airbrushes coming out of China bend easier than any of the other airbrushes. So look for one that is made elsewhere so that you do not have to keep trying to straighten a bend airbrush. The best airbrushes to use that are the easiest to take care of are name brand airbrushes. Airbrush art can go on your cabinets, doors, toilet seats and so much more. Remember though that this does not have to be anything bold. It can just be some simple flowers or ivy trim but the choice is yours. Clothing is open to airbrush art as a way to create unique one of a kind clothing and accessories. If you are doing a stencil for say a dog then you would want to take your time and make sure that the eyes were the same size, the nostrils were cut out shaped the way they should be and so on. If you rush you could end up messing your stencil all up. The stencil is to aid you in creating your airbrush art and is a big part of the art process.