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. These kits come in a variety of sizes and price ranges depending on the dealer you are purchasing them from. Some dealers also will offer low grade products for a low price making you think you are getting a deal. With low grade products you are not getting a deal at all. A good starter kit comes from Airbrush Bodyart. Take a look at children's airbrush art kits that require the child to blow through one end of tube to create the airbrushed art. Now ancient forms of airbrush art have bled over to modern day children's crafts. In 1893 the world seen a more modernized version of airbrushing when Charles Burdick patent the first airbrush device. The use of talc powder after the design has dried will help to keep oil from building back up and thus still ruining the airbrushed tattoo. Nails should be clean and buffed prior to beginning. Buffing the nails will give for a rougher surface for the paint to cling onto. Prior to actually airbrushing the nails, a base coat should be applied. To do airbrush art on nails you will need nail art stencils or nail art masks. The nail art masks are reusable masks that have an adhesive that does not leave any residue on the nails. Of course if you are really creative and very good you can freehand the airbrush art right onto the nails. If not then take the time and invest in nail art stencils and masks. Practice spraying the airbrush at your cheap surface while you learn just what pressure is needed where. If you are using a double action airbrush you should be experimenting to see how far back gives you how much paint spray. Once you are comfortable using the airbrush then you should work on creating shapes with your airbrush.