Recycling an old painting

Often in my studio work, I will decide to do some painting and realize that I have many unfinished starts to paintings lying around. I know I should finish these pieces, but when it comes down to it, some of them I just won't ever get the excitement back into it. So what to do with these paintings that have started, yet never been realized. Well, today I re-energized one of the them and started a new painting right over the top! What better way to recycle and reuse than to paint over existing work! As you can see by these two images, the image has drastically changed from one of a landscape to a closeup of some of the flowering cacti that I came across a couple of weeks ago. I don't know why these cacti have kept my attention, but for some reason I have to paint them. So look for updates in the next few weeks as the progress on these continue. Now I just have to decide if it is going to be a chunky painting done with a palette knife or a work with brush. PS, the first image I had already started sketching a couple of lines when I decided to take the picture, so sorry I don't have an image of the old piece without any new lines over it.