If you sometimes need a break form washing paint brushes, consider pouring or dabbing a little paint directly onto your surface and smearing with a pice of folded up cardboard or a credit card. I like to randomly draw onto pages with a Sharpie pen and that cover some of my marks with paint. I often will go back over the dried paint and draw shapes and lines on top of the blotches. Then I tear up my painted pages and create abstract collages. I find old books at library tag sales and other places where tattered or old books are either tossed away or sold for under a dollar.