Damage to the air cap and head assembly will effect the performance of your airbrush. 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. You just took two things you seen incorporated them both together turned them into something else and now you have a unique floating cloud playground. Inspiration can also come from books as well. Go to the library and check out some art books to help you get some inspiration to get you going again with your creative design. 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. There are actually two reasons for the base coat. This base coat will help protect the nail from the paint and help the paint to adhere to the nail better. Learn more about how to do freehand is also a great asset of this video. These are advanced techniques and will take you as an artist to the next level of airbrush art. Another way an artist can learn micro airbrushing is to work directly with an expert. Take on a workshop that teaches micro airbrushing and you can learn with some hands on projects under the supervision of an expert. All you need to do is find a design that you like and then trace it out onto paper. Make several copies of the design since you will be cutting on them. Also the airbrush paint will get them wet and they can start to tear. You will need to keep the original design so that you can refer back to it. After you have made copies of your traced design start cutting out the areas that you need to cut out. These are the only types of airbrush paints that are safe to use on the human skin. These paints will have a hard time staying on skin that is oily. A tattoo artist will rub alcohol on a person's skin to kill clean and kill germs prior to beginning to start a tattoo. In this case you are still going to use the alcohol but for airbrush tattoos it is to get rid of the oil on the skin and not to sanitize an area for a needle.