Thank you for all your replies.
@ Trisha Adams I like your fishing analysis...very true.
I've learnt something - the problem with painting it's not like riding a bike. If you learn to ride a bike as a child, and many years go by, it's like you've never been away from that bike. Painting isn't like that at all. This is my real problem that I don't paint often enough. At present I get Saturday morning to paint, so 3 failed paintings over 3 weekends is off putting to say the least.
My problem is that I find it hard to switch on and off when I paint, so doing a bit of painting for an hour then leaving it for a day or two would be a bit torturous. Compartmentalising my brain is something I have never done, enjoying my pursue to the very end, but maybe I need to learn this. I'm sure a lot of artists here are skilled at compartmentalising their brain, no doubt out of necessity.
Anyway, I 'm hoping to break my bad run of luck this Saturday as I will be finishing my second painting for this weeks fantastic challenge - copy an artist that you admire and paint another painting in the same style. So Trisha, I hope to get two keepers...making up for the miserable 3 weeks I had.
Thanks again everyone.