I have a white Carrara honed floor that I had used a poultice to remove some brownish stains cause by moisture. There are several bathrooms in this condo building some were worse than others. This particular floor was very slight staining and I managed to lighten it significantly.
During the poulticing process the floor was etched in the areas it was applied. I now need to remove the etching with my floor machine.
Two questions:
I don't believe the floor was sealed previously and I'm afraid the water from Polishing may soak in to the tile and bring back the brownish stains. Should I seal it before?
Also the etching  is not too bad but you can see the difference between the areas treated and untreated. Which grits should I start and finish with and should I use honing powder?
I appreciate your feedback
Thanks
Chris

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