Airbrush makeup has been used for years for art performances, theater and movies. Whether it is for scenery or performer makeup, it can be applied to create a completely different appearance on someone's face or it can be used to apply makeup to several people quickly. The key is making sure the airbrush makeup is nontoxic and has the appropriate viscosity.
Decide what colors you want for airbrush makeup. Most likely it will be for concealer or else for a color of face paint. Separate the colors by adding a few drops of food dye into different bowls, mixing them or leaving them as solid colors.
Combine the baking soda and vinegar. Let the mixture rest aside.
Put the glycerin and cornstarch into the baking soda and vinegar while it is thickening. Use a spoon or fork to mix the airbrush makeup until it is smooth with a whipped appearance. Make sure it has no lumps or pockets of air.
Put the water in a water bottle or shallow bowl. Add it bit by bit, slowly to the mixture, to thin it out to the desired consistency. If you want airbrush makeup that is thin so it will go on lightly, add more water. If you are making face effects or masks, add only a little water so it is thicker. Stir until completely mixed.
Add the airbrush makeup into the containers of the food dye colors, if you want to make different colors. Add more food coloring as desired to make lighter or darker colors. To make airbrush makeup concealer, add a jar of concealer to the mixture. If you want airbrush makeup for eyes and lips, add different shades of mica powder such as blue or red.
Add a color mixture or the concealer into the airbrush gun and experiment on paper or a human body first to see what type of consistency you have and if you need to change it.
Store the airbrush makeup in closed containers when done if you want to use it again.
Tips
To make airbrush makeup set longer on a human face or body, spray over it with hairspray once it is complete.