Formal Properties

I’m not usually one to gush over formal properties, but… how gorgeous is this?!
I’ve simply taken a canvas board and painted a wash of burnt umber with mineral spirits quite thickly, then took my brush (dripping in mineral spirits) lengthwise across the canvas to create all kinds of ruts, drips, and texture. Instead of doing an underpainting in burnt umber and then grisaille, I can go straight to grisaille from here.