nicktheplumber
Since the base doesn’t leak and is just grungy looking, you might want to try sanding it down (lightly) and then coating it with a fiberglass gel-coat resin (available at boating supply stores or specialized fiberglass supply stores). You can of course rip out the old pan and try to find a new one to fit (I’d recommend acrylic), or replace it with a built up custom pan. In either case, you will demolish the first couple of rows of ceramic tile. You may have a problem getting new tile to match color and texture exactly…unless you have some spare tiles from the original job in the basement.
NtP
