I wanted Dr Mercury to look like and oil slick, with different swirling colours that can only be seen from certain angles. I used Vallejo Metallic medium to mix up a bunch of different greens purples and blues to highlight the metallic black. It worked sort of. In person you can pick up the mini and get different shining colours depending on how you hold it, but it's a bit more subtle than I would have liked. It's a bit hard to photograph the effect.
I still need to paint Hoodoo's Zombie Wolf to go with her. Pretty standard colour scheme but it works well so why mess with it?