I finished...more or less...Medusa's face today.
I had her eyes roll up since she's...well...dead, but I'm not sure it carried the effect the way I was hoping. Also to help with the 'dead' feeling, I painted the eyes as normal, but then went over them with a very light glaze of off white. Not sure that carried, either.
As for the highlights on her face, I glazed over them and a chunk of the mid tone with yellow. It gave an overall gold cast to it that I'm happy with, but dulled down the highlights. That was expected, but I'm not sure if I need to go back and brighten them up again or not. They look brighter in person than they do in the picture here, but still.