Here is our lovely figure model, sketched with watercolor crayon on a piece of watercolor board that I “prepped” by splashing a few colors on it first and then letting them dry before drawing her.
This was an experiment with watercolor crayons and Yupo paper. Because Yupo paper is plastic rather than paper, the crayon sits on the surface. It took a while for me to learn how to control the painting. The addition of water just made everything run off in all directions. One nice aspect of using a surface like this is that any mistakes can be mostly obliterated with water and a paper towel.