Here is a goal: How do I make art on a used CD?

Which way makes more sense to accomplish this goal?

Possible answers: a). Apply an acrylic color to an old CD with a paint brush and let it dry, sketch a simple design on the paint and then use a screwdriver to scratch off the paint to complete your picture.. b). Apply an acrylic color to an old CD with a paint brush and let it dry, sketch a simple design on the paint and then use a hammer to scratch off the paint to complete your picture..
a).