PSI stands for pounds per square inch and for automotive airbrush art you need a compressor that has a psi of 55-65. Iwata is a great name brand to go with and they offer four compressors that will work for airbrushing automotives. Badger is another good name brand that you can go with. They offer several air compressors that will work when doing airbrush art on automobiles. The wild psychedelic artwork that was popular with that era were done thanks to the use of airbrushing. Tie dyed looks and large hippy flowers and even the peace signs were making their way onto vehicles during this era. Airbrushing the artwork on took a lot of time out of painting the vehicles over doing the designs by hand. 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. You will need a air compressor that is designed for airbrushing on nails. The type of paint that you use will depend on what you are airbrushing. Some paints can only be used on certain surfaces and are not safe to use on other surfaces. 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. Airbrush art can just be wording that you have added to your shirts or other clothing or it can be creative pictures of things that interest you. Either way you are guaranteed to have clothing no one else does if you add your own airbrush art to them. Automobiles and motorcycles are another areas where airbrush artists can get creative and create masterpieces. Airbrush Art DVDS For Beginners Some people are fully visual people. This means that they learn and comprehend better when they see how something is done versus reading about how to do it. While most magazines and books will offer some pictures this is not enough for a fully visual person. So when some one is fully visual and they want to learn something the best thing they can do is watch videos that show how to do something.