The gravity feed is a top mount cup that uses gravity to pull the paint down into the airbrush. This feed is great for airbrush art designs that call for fine detail as the gravity feed uses less air pressure. The less air pressure means that you can use slower movements when airbrushing. The bottom feed is where the cup is mounted to the bottom of the airbrush and the paint is brought up via a siphon tube. The possibilities with airbrush art are unlimited and only limited to the artist imagination. Any scene, any surface and everything in between can be airbrushed. Airbrushing looks realistic and saves time over hand painting. If you want airbrush done on any surface or for any reason and do not want to learn then there are many airbrush artists out there that you can hire for any of your airbrush art needs. 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. 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. It is best when using automotive paint to wear a respirator at all times. When using automotive paint make sure that it is thin enough to flow through the airbrush. This video will show you everything you need to comprehend about pin striping so that you can reach professional level pin striping. With this video you can learn about the design and application process, the different types of airbrushes for pin stripping and which brush is right for which job. Learn about choosing paints and other material that you will need. This kit includes a 4 outlet air manifold, 4 single action ABA airbrushes, 12 glass airbrush bottles, 4 air hoses, 10 60ml of airbrush art tattoo inks in white, blue, red, yellow, violet, fuchsia, green, fluorescent green, fluorescent yellow and fluorescent blue and 1 120ml of black airbrush tattoo ink.