In Fond du Lac, one of the most iconic structures is undoubtedly the lighthouse, which was built in the early 1930's.Ron Spies, the CEO of Spies Painting Inc., says the lighthouse has been a part of his life for a long time."I've been with the company since I was a little kid, but started full-time in about '68," Spies said.For the Spies family, working on a local legacy meant building their own.Fourth-generation painter Landon Spies is the late…