Since I didn't get any real suggestions, only comments on the picture that I'd posted, I decided to paint that very picture in acrylic paint!
This is a beautifully colorful abstract piece of art, and very simple as it can be broken down into layers, each layer being a coat of paint and step in the process; this is how I will be painting this picture, and writing this blog!
This layer is so simple, tons of black paint mixed with water and brown paint to soften it as in the model picture. Not really much to describe here; not much technique.
I started by squirting black paint all over the cardboard canvas, trying to reach each corner, then took my second largest brush (second only to the spongebrush) and scribbled and spread the black to an even consistent coat.
I squirted in some splashes of brown and spread it around to soften up the black, the way the background in my model is softened.
Here we see the evenly coated, black backing, but it isn't soft enough.
So now we dip our spongebrush in the water, squirt on some more brown, and brush over the whole thing a little more.
The background layer is done!
Not hard, right? Well here comes the fun.