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Unread 07-20-2020, 08:50 PM   #9
Tool Guy - Kg
Moderator -- Wisconsin Kitchen & Bath Remodeler
 
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Join Date: Feb 2005
Location: Oak Creek, WI
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This is precisely why we repeatedly warn DIY’ers on the forum against using marble in the bathroom. There are common cleaners in many bathrooms that are just aching to permanently etch the tiles. All it takes is one misapplication. But, unfortunately, once someone envisions marble in their home, it’s practically impossible to talk them out of it.

Okay, into your problem.

Most expensive option is to hire a stone restoration specialist who will physically polish away the rough etch marks to restore its former shine. It will look great when they are done. But it’ll cost a chunk of change. Stone restoration specialists usually come with a ton of specialized knowledge to tackle repairs like this.

The other options are iffy. If you’re going to remodel in a few years, you might try your hand at polishing with some dry diamond polishing pads and a variable speed grinder. I personally don’t like dry polishing pads, but with that dull shine you’ve got, you might be able to get away with using them. But like John said, you might be chasing the wind. You may have difficulty getting even results. Your only hope is to run the pads over the entire floor. There’s a 1% chance (I’m being optimistic) you could do a spot repair. But it’s pretty doubtful. You’d need to run the pads over the whole floor. Polishing pads come in multiple “grits” like sandpaper and you work from the rougher pads to the finer until you’re happy with the sheen. The internet could supply you with the tools for not a lot of money.

The last option I can think of is the cheapest and likely to have lack-luster results. That is to do something we hardly ever recommend. And that would be to put a topical sealer on the tile (think varnish/polyurethane). It’s applied to the floor and left to dry as a film. The shine imparted may nicely obscure the dull spots. Or, it might look splotchy. The big reason we hardly ever recommend a topical coating is the relative large amount of maintenance needed to keep it looking good. And if water gets under the stuff, it looks like peeling varnish.

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Last edited by Tool Guy - Kg; 07-25-2020 at 10:57 PM. Reason: Spelling
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