I had went to follow Spry's suggestion about putting the copper bare metal foil over the mando girl's visor but fought with brandishing it and kind of mucked up the job. I ended up painting over the foil with some copper paint I had laying around trying to get it smoother but to not much avail. I may strip it off and do something else.
As far as having hair like the first femando's alternate head, I had considered a removable piece to fit in between the helmet and figure's body. that way the helmet could be displayed with the figure holding it in her hands/arms without the hair attachment.
I like the idea of the silver foil,I'm guessing its like gold leaf from the sound of the difficulty in application.
Here's a couple of mine I did using different methods.
The orange slot I did using mithril silver from citadel with a top coat of transparent orange acrylic glass paint.
The green slot I used the mithril silver again,several washes with green and a clear top coat.
I can try and get some better pics under halogen lighting if you wish.........slots came out shiny and smooth.