Build your dummy with Cocobolo tropical wood arms in place of your standard hardwood arms. Cocobolo is a hardwood from Central America. It is a very beautiful wood, known to change color after being cut. The heartwood is typically orange or reddish-brown in color, often with a figuring of darker irregular traces weaving through the wood. Due to its density and hardness, Cocobolo can be polished to a lustrous, glassy finish.