A porcelain toilet can become scratched through cleaning, heavy use or just time. Unclogging a toilet can leave small scratches. Don't let scratches on your porcelain stress you out; it's simple to remove these annoying and ugly marks inside your toilet. Porcelain toilets can stay beautiful for years with proper care and cleaning. Using a non-abrasive cleaner is the best way to keep your porcelain sparkling.
Sprinkle or squeeze a fair amount of a non-abrasive cleanser on to the scratches. For heavy scratches, you may want to use more.
Rub the cleanser with a sponge or a foam eraser sponge and leave the cleanser on the scratch for a couple of hours. Sprinkle cleanser on all the scratches, using a light dusting on small scratches.
Flush the toilet to rinse the cleanser from the bowl. See whether any scratches remain. The cleanser should lessen, if not totally eliminate, the scratches.
Rub any remaining scratches with a pumice stone. A pumice stone will "erase" the scratches, but take care to wet the pumice stone first and use gentle strokes.
If all else fails, buy a porcelain repair kit at the hardware store.
Always wear gloves when using chemicals to clean your toilet.