This is a beveled plexiglass plate with an under-drawing done in water-soluble crayons. I’m adding watercolor here; the crayons give the watercolor something to cling to, which keeps the wet pigments from repelling the slick plexi surface and pooling in little piles like water on glass. You still get quite a bit of that, but less so when you lay the crayons in first – and the pooling is a good thing because it keeps the image less fussy – and encourages insists upon a more painterly approach.
P.S. I have more to write about Weekend with the Masters, but will have to share on another blog post. 🙂