What is the pro & cons of spray paining a house exterior, besides speed? How do I know if I need 2 coats? PLUMBING: How do I free those frozen oval shut-off valves under my bathroom faucet? They won't turn and I don't want to force them. Second, how do get rid of the high pitch hum when I turn my water on? --Happens sometimes, not always, but sounds like a sustained note of a french horn and it's loud. (stop laughing) Thanks, Carl