Although this is not our area of expertise, we thought we'd pass on this information that was tested by our employees. They are always talking about their own home repairs and we thought
this was an interesting topic and solution.
Rust in the bathroom is usually the result of two related situations. Either iron-containing metals in your bathroom fixtures have begun to rust OR your mineral-rich water supply contains iron particles and has begun to stain areas where water runs. This happens even with a porcelain tub as two of our employees found out.
Bleach and Tilex made the rust stains worse and they sparked another chemical reaction, creating more rust stains on the non-skid surface on the tub floor. Other products that either made things worse or didn't work at all: Lysol, toilet bowl cleansers, Soft Scrub, Goof Off, Awesome, Comet, Simple Green, Mean Green, Magic Eraser and CLR,
However, we found 2 things that really worked: Clorox2 and Hydrogen Peroxide. The Clorox2 worked best and required less scrubbing. Just pour either product on the stain and let it sit. Then scour gently with a damp sponge and rinse. If the stains are really bad you may have to repeat the process twice.
Commented on Jan 28, 2013
I have hard water stains in my bathroom sinks. I used Iron Out, the powder kind. as suggested
above. I let it sit a while and then scrubbed with an old tooth brush. It didn't work either. :( So next I will try Clorox 2 and bleach.