Removing Rust Stains From Toilets, Tubs and Sinks:
Rust and other stains can occur from hard water mineral deposits found especially with the use of well water having high iron content. Staining can also occur from rusty galvanized pipes leaking into a sink, rusty toilet components leaking into the back of a toilet bowl or something metal left on the sink. These stains can be difficult to remove. If this is a recurring problem and the staining is chronic, there may be no way to remove the stain as it may have etched itself into the porcelain.
But don’t lose hope! You’re an About.com Home Repair reader and I’m going to set you “stain free!”.
Most staining is not that bad and can be successfully removed if you know how but regular toilet bowl cleaners or powdered chlorine based cleansers will not solve this problem.
I’m going to show you several options. Some involve mechanical cleaning and some use strong chemicals (so please try and avoid them especially if you have a septic system). Let’s take a look at what options you have for removing rust stains from your porcelain.