Thanks for the kind comments chaps. Some very useful tips - they will all be taken on board when I do my next batch of Chronicle Miniatures (I also have the hobgoblins, but missed out on all the other ranges - a trip to EBay may have to suffice to get those ogres, wolf riders and whatnots).
I have to admit my eyesight isn't what it used to be and I just couldn't see the teeth when painting them. These photos show up lots more detail that I missed. I think I will leave them as is though, so I can see how much I improve (if at all) with my next batch.
The bases are actually stacked UK pennies. When I bought them way back, I mounted them on old non-ferrous pennies but when I came to actually paint them a couple of weeks ago I wanted to, but couldn't, remove the old pennies without damaging the figures. The reason for this proposed basing change is that newer pennies have some steel content that allows them to be placed in drawers with magnetic sheeting to keep them from sliding around. I actually think the double stacking works quite well.
Again, thanks for the helpful comments.