Masonite, linoleum, or vinyl floor covering?

I used Masonite to cove my corners. Always use flat paint. And unless you can realistically render clouds, I would stick with a simple blue sky. A blue sky will always appear completely natural while clouds--not so much. 

I will concur with Dennis.....masonite is the way to go and all you have to do is look at my clouds to see what Dennis is talking about....  Some day, I am going to go back and paint a new sky...

Alan

Thx....Masonite it is.  Seems like flat texture for the paint is also proper.....