Q&A for How to Clean Metal Marks off a Porcelain Toilet

It can, but keeping the stone wet will reduce friction and help prevent scratches. Rub the stone over the porcelain as lightly as you can while still applying enough pressure to remove any stains or debris. You can also soften any stains or buildup first with vinegar or a cleaning solution so you can rub them away more easily.

Yes, Bar Keepers Friend is a great choice for removing metal marks from your toilet bowl. Pour a little into your toilet and gently buff the marks with a scrubbing pad.

Try using an acid-based cleaner or a gentle abrasive, such as Comet, to get rid of the marks. You can also try to gently buff them away with a pumice stone.

Comet cleaner does the trick. It doesn't remove scratches (and it can actually make new scratches on plastic things), but it cleans them to invisibility.

Call a plumber out to determine the problem.

It's best not to re-finish the toilet bowl, instead try to get rid of the marks with a pumice stone or acidic cleansing powder. There aren't many sprays out there that can refinish a toilet if this guide doesn't work for you, you will need to use a traditional finishing paint.