My girlfriend just moved and she has a bathroom that has a gaudy teal blue shower stall she wants to paint white. From what we can tell, it's just a plastic stall, not fiberglass. She got a few spray ...

That fiberglass shower stall (or bathtub or sink) is becoming embarrassing. The bathroom gets regular cleaning, but no matter what you do, it seems, the soap scum and grime build up on the fiberglass.