Thinking about what else I could do to the desert mando's alternate head, I remembered the copper colored nail polish that I used for the visor of a desert camo airborne helmet, once. Then, I remembered that I had some copper bare metal foil in the customizing equipment and product pile down in Clonehead's catacombs "my basement".
Bare metal foil is a super thin adhesive backed real metal foil that is available for car model enthusiests and is used to decorate the chrome trim on a car model and has a more convincing metal color and look than silver, gold, or copper paint would. It comes in those three colors and is sold in serious hobby shops like hobbytown usa or hobby heaven.
It works like this: Using a sharp hobby knife, you cut the shape to cover and slightly lap past the shape that your are foiling. Then, using a dry paintbrush or toothpick or the like, you burnish the foil down until it conforms to the shape that you layed it over. "in my case, the lens of the biker scout visor." The adhesive backing should hold it in place and you use your hobby knife to carefully cut around the border of whatever shape that you foiled and pull the scraps away.
That's what I'm doing to our biker scout helmet visor and after I have painted around it, it will look like he has a copper color reflective lens in his goggles. Neat, huh?