...Gouache on the Fly, my course in using watercolor instead of gouache to fill a very portable sketchbook. True, we also used white gouache and a little black, but most of the paintings were done using tubed watercolor like it was oil paint. We had a great time exploring this approach and here are the demos I did for those in the class but I thought you might enjoy them also. This is my third sketchbook done this way and I'm still enjoying the processs. Below are full page (8.5x11 inch) scans that begin in value studies and move on to full color.
The top one of the bridge is on a piece of watercolor paper; the bottom one is right on the sketchbook paper and is a value study done in a warm and cool color but not representative of the color in the scene, just the values.