This isn't strictly a speed painting, but that's what time lapse painting videos tend to get called. I enjoy watching them so I thought I'd have a go myself. There are hundreds of these on YouTube, mostly by nerdy blokes using attractive women as their subjects. Well, if you're going to spend nine hours staring at someone they might as well be easy on the eye.
If you want to see the finished painting in detail, it's on my DeviantArt page.