He served in Desert Storm. His dad played for the Red Sox. And he keeps bees — but we’re interested in him because he has mastered the art of hand made signmaking. A day’s work for Nicholas Lonborg entails carving letters in wood and applying gold leaf. He specializes in highly finished quarterboards, like the one he is working on here. Once associated with ships, quarterboards now mark personal property, especially on the seafaring island of Nantucket and other coastal communities.