The essence of the exercise is to get two canvases going at once, working 15 minutes at a time on each, switching back and forth to allow drying time, and covering 3/4 of what you previously painted on each until you build up four layers on both canvases.
I elect to cut 8" squares (vs. suggested 24") from the end of a roll of brittle 37-year-old wallpaper.
I decide to paint on the design side of one square and the pre-pasted back of the other. Hard to imagine getting attached to either. I start with the design-side square, pick three colors, create a loose-grid format underpainting.
Please laugh with me: I get attached immediately. To the first layer on the first sheet!
Nonetheless, I grit my teeth and soldier on.
I'll post Nonattchment 1 today, Nonattachment 2 tomorrow.