D'you know what? I think I get oils. A little light bulb went off in my head as I was painting more detail into the face today. I really like oils! Now I'm excited to finish this painting and see how it'll look. This is a close up of the face, sorry for the dodgy flash photo.
Still trying to improve the likeness - the left cheek (his right) is too high so I need to see if I can bring that down somehow. But this is fun. I think I'll be doing more of these smaller oil paintings :)