On this day in 1938 Roy Plunkett patented a slick product called Teflon. Today it coats three quarters of all pots and pans in America. Another popular coating is fresh paint. If you're planning to paint, here are some 'slick' tips to help get you through. Wondering how a new color will look, but small samples are hard to judge? Get more and tape them together for a better visual picture. Once you decide, how much should you buy? Easy, multiply walls by height and width and divide by 300. A gallon covers about 350 square feet. That will leave some for touch-ups. When painting, put petroleum jelly on hands and face to make cleanup easier. When you're through, draw a line on the label to show how much is left in the can and write down the brand, color, price and dealer info. Then hide it behind a wall-switch cover. The next time you paint, like hieroglyphics, just read the writing in the wall. And that's the On The House tip for today.