I was searching for a less noxious alternative to latex-based masking fluid when I heard of people using gum arabic as a mask or resist. Gum arabic, a plant resin used as a binder in watercolors and also a food ingredient, would certainly be less noxious. But how well does it work?
I made two paintings to assess the challenges of using this water-soluble mask. One with acrylic—my long-time medium of choice—and one with watercolor, a medium still new to me. You can see the steps and results of both paintings below, as well as an early test.