The best airbrush to use for putting airbrush art onto an automobile is a gravity fed airbrush. This is the one that professionals use and will give your artwork a high quality look. The paint can be automotive paint but make sure that you use a well ventilated area as the fumes can pose a health hazard. 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. You will need an exacto knife to cut your design out. Depending on the size of your stencil you can probably create more than one stencil from this plastic folder. 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. So take your time to ensure you don't make a mistake on a person's body with the airbrush paint. While experienced artists understand this, again a beginner may not. So it was worth mentioning as well. After the airbrush art tattoo is completely dry then you need to apply talc powder. The talc powder will help to absorb additional oily ensuring more life for the tattoo. Over spraying is when the artist sprays outside of the area in which they are trying to spray. When working with nails you do not want to end up airbrushing the person's fingers. So before attempting to do airbrush art on nails gain some experience with airbrushing on larger surfaces. Depending on the type of airbrush art you are doing will determine the type of airbrush that you need. Your airbrush will have a handle on which you can hold onto the airbrush with. Airbrush models come with either a solid handle or a handle with an opening. The purpose of this opening is so that you can adjust the needle without removing the handle in a single action airbrush. Most experienced airbrush artists will actually take their handle off so that they can deal with clogging issues without delay.