When the entire canvas is covered in a layer of chalk, I use a knife to carve faces into the oil chalk, a deeply meditative process. I find this method exciting because it presents you with a completely different set of challenges but also opportunities, such as learning how to use a knife as a tool in the creation of a painting; balancing the edge of the knife over the canvas, producing thin and broad lines and cuts, piercing through the sometimes several layers of chalk, from which an endless world of colors and possibilities spring out.