Cleaning/updating slate floor question

50's slate floor in our kitchen. The previous owners used some sort of wax on it. We've tried all kinds of cleaners, and even tried sanding one tile. It took almost an entire day to get that one clean. The grout has also been waxed and is breaking and falling out in pieces. Is it salvageable? Could we rent an industrial sander and basically grind it down?

  3 answers
Your comment...