You may also add any decorative pieces like rhinestones, beads or other multimedia components. Gently press your pieces into the clay for a snug fit. When you're satisfied with your design, let it cure for 24 hours; no need to bake. It's best to rest the clay on wax paper so it does not stick to your surface as it cures. Any smooth, non-porous surface should work if you don't have wax paper. It should not shrink or fade once cured.