I had that happen on Mexican tile. Found out they had a solvent based clear on the tile face. Regular floor stripper didn’t do anything to it. I wonder if DBX from Klenztone may work or worth a try. Good luck

> On Nov 2, 2021, at 8:34 PM, mark winslow <mwinslow1960@gmail.com> wrote:
>
>
> I have a slate floor that I tried stripper on it set for about 20 minutes did not do a thing I used my pocket knife a scraped it off this area had a rug over it the rest of the floor is like new and it’s around 30 years old, shines like it was just done, my ? Is what would be the best way to fix this ?
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