I've painted over some of my abstract paintings, just letting a little color show thru. Then I took some green ink and a small brush and made a design. Using watercolors and silk paint I added some colors. I really like how it turned out. I started a second one that isn't finished yet. Working on two at the same time, helps me not to over do it on one each, as I find my thrifty soul wants to use up all the paint on my palette. I was inspired by a fashion magazine layout, where the background looked like ink drawings with just parts of it colored in.