As aerosol spray paint is the traditional tool of the graffiti artist, the crossover of the medium into their legal murals is to be expected. Most of these artists also use house paint, rollers, and occasionally brushes to achieve the intended effect.
Aerosol paint works similarly to an airbrush.
Artists are able to cover large areas quickly, manipulate the spray, and apply different tips for different effects. Artists often portray very commercially viable images that promote business and attract customers. They also often consider the community in and for which they are painting their murals. The wall was plagued by gang graffiti until the placement of this mural. Since it's placement the wall has remained nearly untouched by the gang graffiti.