**WTF**????

When I overpainted the last mess with pure cobalt blue (Winsor and Newton) the wet paint looked fabulous and as it dried this is what I got. It is still slightly wet in a few spots, and so I'm back to wonderment with what is happening here. It is better than the last time, so I guess the next step is to cover it again with pure cobalt out of the tube and keep trying until it dries a solid color without the mottling. I can only say that in my 55 years of painting I've never experienced anything like this before and I am so frustrated. I'll let it dry another few days and see what happens next.