Glenariff Waterfall Painting

I love painting flowing water at the moment! I've been doing a disciplin thing of only using paint for everything in a painting, as going in with pastels or water colour pencils seems - not cheating, there is no such thing as cheating- but too much a technique based solution. I want to know I can do it with a brush first.A bit of chalk would have made the spray & texture on rocks a whole lot easier here, I might ease up a little & go mixed media with some of the next paintings.  This ones 17cm x 22cm.