I took one of my personal photographs (from our Rome trip) and printed it out in black & white. Next, I painted on a layer of matter medium.
After the medium dried, I added color with watercolor paints. I didn't use a large amount of water, when painting, because the matte medium would have deteriorated and ruined the photo.
I took the same image and added a strong contrast in Photoshop Elements. I think I like this second rendition better.