Thanks dierat. I'm still learning how to manipulate the colour digitally - it doesn't work quite the same as traditional and I'm finding the difference frustrating. It's getting there, but that smooth blend on the edges is my big bug bear at the moment. I'll get it soon.
I'm putting the last pic on ice for a bit while I experiment a bit more and can get cleaner colours. I did some hair the other day that turned into chicken feathers - interesting discovery. Silky cloth is coming along, as is gold and marble - flesh is nearly there.