Ok, so calling what I did here "sculpting" would be generous. More like a fiddle around while on my lunch break at work with a toothpick. Just to see what working with wax felt like.
I've heard of sculpting with wax. I always thought it must be purely reductive - as in hacking away until you have what you want shape wise, with no ability to build up. I've read it's how Matt Doughty works and I know Wrestlingsuperstore.com used modellers wax when making their Remco wrestler repros and Marty Hansen has mentioned using it too.
This is wax from a six pack of Babybel (little wheels of cheese). Someone told me just as i was about to bin it, that you can use it for modelling. I made a Glyos-styley guy and a little robot dog with a toothpick, and rolled various pens on it for texturing. I might actually start using it for head sculpts - especially with MOTU heads - might give it that poorly defined but nicely smooth "vintage" look.