By contrast, this image shows a canvas toned with turps wash of olive in the morning and painted over the same day. No muddling of the sky color: Titanium White and Manganese Blue. The Turps stinks to me, so I lay on the wash outdoors. It drys so fast there is no stink to the canvas. Voila!
PS In each case I wiped out the sky area after laying on the wash.