To prevent color “bleeding” when airbrushing cookies, follow these four tips: 1. Most “bleeding” happens when a stencil is not lying completely flat, try to make sure the cookie stencil (and icing top coat) is lying flat over the cookie. It often helps to hold down the edges of the stencil with chopsticks or cookie magnets (especially if the icing is not flat). 2. Use a low pressure setting on your airbrush. Stencils are best used with many thin, even coats of color. Extra airflow will create a less perfect airbrush finish. 3. It is helpful to turn the airflow on the Air Genie down to its lowest setting before slowly turning it up until the airbrush is coating food colorant sufficiently. With the airflow turned down it will help prevent food coloring being propelled beneath the stencil edges. 4. When spraying, keep the airbrush nozzle pointing straight down, airbrushing at an angle will have some paint slipping beneath the stencil design edges. When airbrushing, try to move your arm only, not your wrist, to keep the nozzle pointing straight down.