I'm always keen to 'loose' the white canvas, but prefer to not to just use an ochre wash, I like to get an idea of the colour balance of the composition. Using very dilute oil paint I've painted a skin of basic colours just considering the light and shadows. I intend to work over this layer using a palette knife.
Sorry to go on about my broken wrist, but this is the first oil painting post rubbish wrist, so hopefully it will cope, at least no pencils to sharpen ( however I've now invested in a very swish electric sharpener ), already struggled to clean up my brushes today, so probably just as well using a palette knife.