Here is a great way to test flat latex paint when comparing one brand against another. Since there are no government regulations that require paint manufacturers to list their content, our test should prove to be valuable. Buy a small sample of each brand that interests you. Mix it completely and place a dollop of each sample on a piece of scrap wood, or you can use cardboard -- any surface is OK. Place a drop of food coloring onto each dollop of paint. The food coloring that spreads the least indicates the best paint. And that's the On The House tip for today.