In recent years, more exotic wood varieties have become popular, including meranti mahogany from Southeast Asia and South American cambara mahogany. Mahogany can last for years in its original color, with the proper care. In order to ensure that the original rich-hued reddish brown color is maintained, it makes sense to regularly apply a UV-blocking protective coating that is both oil-based and pigmented. The deck should initially be treated within a few weeks of installation and, in situations where it gets abundant direct sunlight, each year thereafter. A critical point is to avoid thinly formulated deck treatments that will not fully soak into a dense wood like mahogany. While many penetrating oils are in a shade of brown, there are products on the market that help preserve the natural reddish hue of mahogany, and it is worth seeking these out.