What, the copper part? Nah, we stared at this picture a few weeks ago. The base copper still looks like plating to me. If it was plastic I'd expect the base copper color to have as much peeling as the clear coat, or at least some obvious gouges and scratches down to the base material (more red color).
EDIT: I'm still not convinced. That aluminum reflective property with scratches is too authentic looking to me. I still say that's machined.