Those who love texture will appreciate the point of enhancing it with specially-mixed acrylic washes. Learning to make this mix was the first part of our class. While there are many recipes for it on Your Tube, we were aiming to mix something that could be used in a variety of materials such as paper, molding paste or canvas.
Our surface was heavy watercolor paper because this paper can take a lot of abuse. We scored it, sanded it and covered it with masking fluid. The texture and hues on the wash can serve as a beautiful background for a collage. Once the acrylic washes were applied with a spray bottle, we tilted it and let the excess pour on a mixing tub that had an inch of water.
The second part of our class was devoted to learning how to mix the paint for a pour. This time we tried both paper and canvas. I had a few examples to show. There are many resources on You Tube that can show you how to make various types of pours, but I find there is no substitute for doing one yourself. Not everyone is comfortable with the messiness factor engendered by this type of activity. By the time we finished, our pours were hanging from a clothesline, dripping lots of paint on my studio floor!