Tub liner cracked and was holding water.  The bottom was cut out and rebuilt.
Photo Gallery
Repair of a tub liner that cracked and was holding water between the liner and the old tub.  The floor of the liner had to be cut out and repaired around the entire floor.
Before and after pictures of resurfaced vanity  tops and kitchen countertops.
This is a metal tub.  The area in the floor was rusted and weak.  One spot in the floor rusted through and was leaking.  The tub was repaired by installing and inlay rather than replacing the unit.