Toilet bowl stains can be removed by using any store bought toilet bowl cleaner or bleach, a pumice stone, some sandpaper and rubber gloves. To clean the stains, apply the toilet bowl cleaner or bleach and scrub with the pumice stone and sandpaper while wearing rubber gloves.
There are a variety of other methods that can be implemented to clean toilet bowl stains. If the smell of store bought toilet bowl cleaner or bleach is too unpleasant, stains can be removed using vinegar. One way to do this is to place 3 cups of white vinegar into the toilet bowl and scrub the stains with a pumice stone and sandpaper. Another method is to drain the toilet bowl and spray vinegar directly onto the stains before scrubbing.
Powerful cleaning agents can also be used to remove tough toilet bowl stains, such as borax powder, which can be found in a hardware store. Before using borax powder, be sure to shut off the water supply and completely empty the toilet bowl by flushing once. Dust the stains with the borax powder and scrub with a pumice stone or a toilet brush. After scrubbing, leave the borax powder to sit for at least half an hour before reconnecting the water supply.