I've got a Kreonite darkroom sink. It is made of fiberglass. The top side is smooth and feels like plastic. Before I put up the walls and make the dark room, I am wanting to paint/seal the sink to make sure I do not have any issues in the future. Any suggestions of paint/epoxy? I've called the few marine shops and auto paint places and no one seems to know what I need. I've spoken to several people. It's kind of sad, actually. So, is there a product I can get at Lowes or Home Depot? Thanks.