I found a professional painter in the paper, advertising 36 years of experience. I called him and he came to my house to give an estimate to paint the ceilings in my house. I have 9 rooms, some with cathedral ceilings. I called 5 other companies and got estimates, but he was the only one who actually came to my home and described what he was going to do. He said, he will use 5 gallons of paint and mix 1 gallon of water with the paint, it makes it go on smoothly. That sounds bad to me. So I need advice on how to handle this.