I am remodeling a 1957 house. The only bath is a iron bath tub that is currently being used today. The floor of the tub has rough brown bottom. It is ugly! What can I do to make it new again and I don't want to replace it. But also in this bathroom the walls are covered in pink ceramic 4" X 4"tiles. All 4 walls are covered with this horrible pink tile. How can I paint over the existing tiles. I don't want to spend any more money on this bathroom.