Cash: I've been a painter before (of the "walls" variety, not the "pictures" variety) and the only way I know to really do what you're talking about is to paint a uniform blue, then use a wash of white paint, probably diluted by more than half with water.
What you could try is painting a white line at your horizon and smudging it upwards with a wet rag as you go. OR you could dilute the white even more and rag it on (meaning: dunk rag in paint and smear it over the wall), paying more attention to the horizon and less to the upper reaches of the sky.
Grey Area: that method you describe simply won't work. Rollers, decent ones, hold too much paint, and when they run out, it's never uniform -- always blotchy, with lines of unpainted stuff in regular patterns among the painted stuff. And, because there's not that much paint there, it tends to dry quickly. With a little work, this might make interesting cloudy patterns, but another problem is with the edges of the roller being so nice and even. Lots of straight lines.
The plastic bag thing might work, though. (I'd just use a crumpled rag with undiluted white paint, then smudge around the edges with a torn paper towel, but that's because I'm used to how they work.) Might also be interesting to mix a little yellow or orange into the white for clouds reflecting sunlight. |
