To create a skull costume, Goodwin has one pro tip: "Look at a picture of the skull and try to draw the eyes, the jaw, and the teeth."
She suggests using water-activated face paint (like the Kryolan Aquacolor ($15)) for the all-over hue you choose for your face. To create the lines, she recommends using a black eyeliner before buffing it out with brown eyeshadow. It gives the look "smokiness and dimension."