I'm pretty impressed with the results of the first stage of my editing BUT I'm pretty sure I don't have a "clone stamp" tool in my painting kit. It's neat how you can pick up the surrounding pixels and paint them over top. For example, the cut line behind the ladies was quite sharp and noticeable but after painting over it with the clone stamp tool and a watercolor brush (digital of course) it is much less noticeable. 
In the second stage (layer) I picked up some of the darker pixels and used a "heavy stipple" wet media brush to to move that color around in the painting. I'm not quite sure whether this is working but it shows what can be done quickly to get an idea about the next step to take with the paper version. Enjoy!