With a little do-it-yourself magic-and the help of master DIY author William Spence-you can make a big difference in the look of your house. Window and door casings, baseboards, chair rails and wainscoting, cornices, mantels and other interior trims can change a room's character, insert period detail, create a focal point, and add warmth. The author gives plenty of guidance on choosing wood hand and power tools and stock and custom moldings made from...