Airbrushing is using specialized tools to mix paint and air for 2D or 3D painting. They can range from large sizes as in those used for vehicle painting to small pen sizes used by artists. You will need a compressor to use these, my first compressor was a car tyre, this was upgraded to a large garage compressor that we used to spray a UTE. Spray cans are also airbrushes. This is my first airbrush I acquired many years ago.