Most stencils and masks that you purchase are reusable. The stencils are made from different material depending on what the stencil will be used for. But no matter what material your stencils are made from they all have to things in common. One the stencils can start to get expensive purchasing. Secondly you are limited to only creating designs based on the stencils that you can get your hands on. Another great way if you are doing this at home is to allow the design to dry then turn the shirt inside out and throw it into the dryer for about 40 to 45 minutes on the highest heat setting. After this your design will hold up to laundering. If you use a paint that does not require heat setting then you should still set the design. By acquiring the skills needed to do micro airbrushing the artist can capture more detail in their airbrush art on the model car. Imagine being able to create realistic eyes on a dragon you just airbrushed onto the hood of a small model car? When a person looks strongly at your artwork on the hood of the model car they can really see the capacity of the skills that you have as an airbrush artist. Using a cheap surfaces airbrush circles, triangles, squares and rectangles. While this may seem stupid it will help you to learn how to create designs using your airbrush. Continue to practice with shapes until you are able to perfectly render airbrushed shapes. Once you have the ability to render the shapes, you can move on to rendering shapes in different textures. Take the time to gain knowledge of all the parts of your airbrush will help you to learn how to properly work your airbrush and also how to take care of it. If your airbrush is internal mix then it will have a needle. The purpose of the needle is to control the paint flow. Any damage to your needle can cause very bad paint spray patterns. Instructions are also included in the book on how to use each airbrush. So someone who has no real prior knowledge this book will help you understand the airbrushes that you will be using when creating airbrushed artwork. Getting Started in Airbrush by David Miller is also a great beginner's book on airbrushing.