A process whereby paint is broken into finely divided droplets and then applied onto the substrate. In modelling this applies to the process of airbrush ing, where paint is forced through the airbrush nozzle under pressure. The process is almost always enabled by thinning the paint down with a suitable thinner. It is important to get the correct degree of atomisation otherwise satisfactory end results will not be obtained, and usually some experimentation with either or both of paint consistency and airbrush pressure is required.