We bought the cast iron sink salvaged. It was intended to be a "drop in" sink but we propped it up with the side panels (2x material) to make it into a vessel sink. We patina'ed the bottom with a salt and vinegar and left it in the rain. We did the same thing with the cast iron tub to get the patina on the bottom. You can read more about this project here...https://www.houzz.com/magazine/room-of-the-day-a-salvaged-bathroom-full-of-fresh-ideas-stsetivw-vs~60577920