One of the most common questions we get regarding marine varnish is what kind of finish is best for a mast. Even though aluminum has long since replaced Sitka spruce as the material of choice for a sailboat mast, there is no shortage of boats that still have wooden masts. Many of the Taiwanese-built boats of the 70s and 80s had wooden masts, and of course, a wide range of U.S.-built classics still have their original wooden masts.