1) Fiberglass tubs are notorious for getting hairline cracks that usually open up when someone is standing in it with the water running.
2) Also it might be a leak from upstream (plumbing behind the w ... read more
I have seen it done and seen the paint last if cleaning is thorough and the proper paint is used but the first answer is true. You won't replicate a factory finish and it is nore difficult to do than ... read more