I thought I'd post these progress shots that I used in a class a while ago. I intentionally left the initial stages as is so that the finished painting showed the whole process.
Of course, I would refine it even further if it were a finished painting but this was purely for a one day demonstration only.
I hope some people find it useful anyway.
Best to download the image and view at 100%. Cover the left half of the last image for an idea of what the finished painting would have looked like.