Though some people paint decks with deck paint, most choose to take advantage of the natural beauty of expensive decking woods by applying a clear or lightly stained finish. If you do choose to paint, use a stain-blocking oil or alkyd primer first.

In general, the best finishes are those that soak into the wood, not those that provide a surface film. According to Bill Evans, Technical Coordinator at Thompson & Formby, "A heavily pigmented, solid stain isn't really recommended for decking because it shows wear patterns and may tend to peel. You want something that really soaks in. "

There are three important characteristics to look for in a finish. First, the finish should be "water repellent" or "water proof," not just "water resistant." Second, it should offer UV (ultraviolet) protection. And third, if mildew is a potential problem, the finish should contain a mildewcide, which a "wood preservative" does. Regular preservatives should be reapplied once a year; newer and better "toner" products offer more UV protection and may last up to four years. Whatever product you choose, read the label to be sure it's right for your deck. Buy quality materials and follow the manufacturer's directions for application. Your result will be a deck that provides you with years of lasting beauty and enjoyment.