>>96836195
the only technique i figured out myself that i really liked was how to do cool glowing eyes
>take a playing card and fold it in half across the shorter side
>poke a hole along the crease using a pen or sharp file
>hold it close to the eye and airbrush bright orange through the stencil
>then hold it closer to the eye and airbrush bright yellow, keeping it inside your orange
>repeat the orange step again keeping it inside your yellow (optional)
>paint the eyeball itself brightest white
takes a bit of practice but it's simple and effective