How can I remove hair dye stains from a porcelain-top vanity?

Oh Goodness! Bless your heart! Contact a speciality countertop store, and they should be able to tell you what to do. Good luck!

If brand new, you are still under warranty. Call the store where you purchased and go from there. And never let her dye her hair there again without covering up first with plastic, and old towels over that to avoid any damage.

https://plumbtastic.com/how-to-remove-hair-dye-from-your-sink-or-tub/

http://www.howtocleanstuff.net/how-to-remove-red-hair-dye-from-bathroom-sink/

https://www.stain-removal-101.com/how-to-remove-hair-dye.html

Yes call the manufacturer. Don't tell them you tried nail polish remover or bleach as both could void your warranty.

That happened to me one time, I was dying my hair black and I spilled it on my walls and on my bathroom sink, I said too myself I will clean it up later, LOL!!! But what a no-no!! so I went and bought Magic Erasers, the hair dye came right off the walls and off my bathroom sink, You can maybe try the Magic Erasers, and see if it will come off, Good Luck Lisa

Or you can try oven and grill cleaner.

Or you can try peroxide, or oven and grill cleaner.

What type of surface is it?

Places that sell salon products carry a hair dye remover. I don't know if it will work on your sink, but it might be worth a try.

I have used lemon slices with the juice, it took awhile but it worked.

It's too late now to try this, but for future reference hair dye will remove hair dye stains while still fresh. Magic erasers work for older stains also.

Try these remedies

There are several ways to remove hair dye from porcelain and fiber glass finishes, including the following:

1. Rubbing alcohol. Apply some of this powerful cleaner to a rag or cotton ball and wipe the stain. ...
2. Nail polish remover. ...
3. Vinegar and baking soda. ...
4. Lemon essential oil. ...
5. OxiClean and water. ...
6. Soft Scrub with bleach.