bonestructure,

It is the post-work that is the creative part, the fun part. And you are right about underpainting, it makes wonders. In fact, the underpainting is more powerful than it is for traditional artists because we can make non-destructive changes, something the Flemish old masters (who invented the technique and could use up to seven layers of underpaint) could never do. Just add a mask over the underpainting layer. Of course since they were masters they managed anyhow! :)

I was a bit harsh but I always gets irritated when no one answers my post! I see quite an interest in the post-work phase, popping up here and there. IMO, when you upload to the gallery it is always interesting to see the work both before and after, so you can discern what is post-work or not.

Thank you for your tip most useful. I have added it to my arsenal. :)