What mixture of acrylic painiting do I need to achieve a copper tone?
The appearance of metallic objects, like copper, depends not only on the diffuse color, but the color of the highlights. Metals look like metals because their highlights are colored. That means that you can’t directly mix a non-metallic paint to have the same appearance as copper. You would need to have a reddish-brown color and then paint a representation of a 3D object that illustrated the metallic highlights. In that sense you could mimic the appearance of a metal.
