Ever have one of those days?
While applying black gesso to a panel, I tipped the cup holding the liquid onto the floor. What a mess! I know it’s only a trick of the mind but the black gesso seemed to take longer to clean up than white gesso; no matter how many times I washed the sponges out they still kept a gray tinge. My hands haven’t been so irredeemably soiled since my gas station days when I was in college.
Anyway, there was enough black on the cheap 4" house painting brush I was using to swipe this expression of my frustration onto a piece of scrap paper.