Rick, forget painting for a moment. There is a cool drawing game we "deviantArt" artists are playing, called exquisite corpse. You draw on part of a page and cover it up, with only a strip showing, and the next one continues drawing. You can do that several times on one page.
It is a old game, the Surrealists did it often:
https://en.wikipedia.org/wiki/Exquisite_corpse
I haven't had time to do much of it lately, but for a while we used to send these back and forth worldwide.