I've posted some videos where I've used a special "painting rig" that I made. Up until now I hadn't described what it was, but basically is a Gimbal mount. Here's a video showing how to make your own for about $10. Links to the other videos are:
http://www.miniwargaming.com/content/finecast-cockatrice-painting-tutorial
http://www.miniwargaming.com/content/warhammer-fantasy-tomb-king
