When I discovered that you could water down acrylics and make them look like watercolors, I was hooked. I thought it was a perfect base for anything... This is my personal favorite wash-splatter-painting ever:
Step 1: a smooth watercolor wash of multiple colors
Step 2: some splatter of the corresponding colors as the next layer
Step 3: get 3 generations of pretty colored handprints and add some mixed media decoration.
This canvas went from a beautiful abstract painting to a priceless family heirloom!