The LEGO Group has already created gold C-3PO minifigures
Details about the 5 Solid Gold Lego C-3PO minifigures given away by Lego. Where did they go? - Minifigure Price Guide
Lego® Star Wars Custom Gold Chrome C-3PO Minifigure Mini Fig - Etsy
LEGO Star Wars Pearl Gold C-3PO Droid Minifigure | eBay
Just purchased with great luck these two US and European variations of Lego Chrome Gold C-3PO minifigure in like new condition from private collection. : r/lego