Supplies:
-- An unwanted CD
-- Black acrylic paint
-- Sponge paint brush
-- Wooden coffee stirrer
Apply 2 thick layers of acrylic paint on the recording side of the CD, letting paint dry thoroughly between coats.
Once all paint is dry, hold the coffee stirrer and begin to scratch off the paint in the depiction of a skull that you like. The reflective side will show through and catch the light in interesting ways.