Here are the step by step images of my demo painting: (full disclosure--I finished the painting once I got home, as this method is not one that can be completed in an hour). Click on each photo to see a full size view; I've included captions with a description of what I did in each step.
"Left Holding the Bag"; acrylic marbling/collage (acrylic skins) on watercolor paper, 10 x 14" © 2019 by Liz Walker