Architectual Millwork These owners opted for a fireplace that was unusual for a Beacon Hill townhouse, so we designed a mantel shelf that worked with effect of the fieldstone. We have a millwork company that produces these beautiful little moldings. There are literally thousands of choices. Nothing like a custom made corbel to dress up a project. Wainscot: It adds a lot of class to a staircase when you add some custom millwork and moldings.