Find a way to incorporate metal into your piece of art. Either paint on a metal surface or on gold or other metal leaf surface. Or incorporate gold or other metal flakes or metallic paint into your painting. Imitation gold leaf on Amazon for about seven dollars. Real gold leaf is more expensive. People even use soft pastels over gold leaf. You will need to research the technique for this challenge, because there are usually several steps and they vary depending on what material you choose to use. Did you know that you can even buy edible gold leaf and use it in your baking. Maybe some of you expert bakers can bake a beautiful piece of art.