Blimey, that's a lot of questions! Let's see...
yep, still using super sculpey (the grey stuff). The yellow is miliput - it's like green stuff but dries much harder. I'm struggling with my models breaking while I work on them (I'm a clumsy, fat fingered sort), so I'm hoping this will work better as a framework.
The he smoothness comes from baby oil (weirdly). Works a treat on sculpey - but you have to be careful, if you bake with it still on it can wipe away the details.
A gubbins is a quaint old British term for paraphernalia, stuff, things. A lovely word, gubbins. I keep thinking I'll do a goblin carrying loads of stuff around and call him gubbins.
Anyway, last bit today: I roughed out the hand in miliput (as a frame, mainly, that's why the fingers aren't detailed). Had loads left over so made a first attempt at a hat. It will need a brim. Not sure if it looks too silly at the mo.