the sky was painted with the #10 round and cerulean blue over most of the area and with a touch of raw umber for the grayed areas where the clouds were looking just a bit ominous in the far northwest. i generally lay a pretty wet patch down near the top of a white section of cloud with cerulean and blend that in moving upward with the gray of a cloud bottom tapered into the puffy whiteness of the cumulus. then i spritz water at the lower edge of the cerulean allowing rivulets of paint to run down the paper more or less haphazardly and then blot lightly where i think it is getting entirely away from me. i then move to the next higher bank of clouds and repeat the process but on a little larger scale as it is supposedly moving toward me and therefore would look larger. so far so good. i'm sure i'll figure out some major gaff before it is all said and done but for now.........ok.