I really think you did a great job on this model, especially on the detail on the head, i agree with chris 49 dont highlight yellow with white but its a very crisp and awesome paintjob definate win
first off can i just say that you should NEVER highlight yellow with white! the cloak could do with a few more highlights to build up the blend. the face looks pretty nice though! a tip for when blending areas such as cloaks and the like is to realy water down your paints alot and if you really want a smooth transition between the shades is by using wet-blending or i find feathering easier. there are articles on how to do this in the articles section. the methods take a while to get write and alot of practice.