All,

I looked @ a job of a newly installed polished mosaic marble floor. They used sanded grout. The floor was etched slightly when they used vinegar to clean off the grout film. The real problem is that the small tiles have a lot of scratches. In the past I have had no problem restoring marble floors with sanded grout. But this floor is not 12X12 tiles.  Can I restore this floor without having the grout replaced with unsand grout? I thought of using my 13 inch floor machine, starting with 120 grit diamonds. The reason for using my 13 inch floor machine is that I’ve been told that a smaller diameter floor pad is less likely to leave picture framing. I do place a white pad between the machine and diamonds. . After 800 polish with polishing powder. I normally use 5X, but I’m concerned about 5X impacting the color of sanded grout. Any suggestions would be appreciated.

 Please see attached photo.

Thanks,

Roger Konarski