During a recent visit to Middleton Place, an historic site in Charleston, South Carolina, I spotted an outdoor interpretive sign that’s so nicely crafted that it’s withstood several years of weathering outdoors. The wooden frame supports a one-inch thick plywood panel (two thinner panels secured together) whose edges are sealed and entire surface painted black (black is Middleton’s standard color for sign posts). The interpretive sign is printed on a 1/16″ thick sheet of vinyl (or a similar synthetic material) and glued onto the face of the panel. The top edge of the sign is protected from rain by a copper cap. One corner of the vinyl has turned up over time, but otherwise, the sign seems to be in perfect condition, despite the heat and humidity of summer in the Lowcountry.