I was called to remove a heavy wax coating on a granite floor. I’ve discovered that the janitorial company has been stripping and waxing this floor for several years. The problem is the granite is developing small pits and appears to be falling

The problem may be with the strippers that have been used. Many strippers have an alkaline pH and this can lead to the deposit of alkaline salts in the pores of the granite. If the stripper is not rinsed throughly and any stripper residue is left behind, these alkaline salts can deposit. When the floor dries the salts crystallize and expand causing the surface of the stone to spall. If this is the case you will need to remove the coating and throughly rinse the stones surface. I would apply a light wash of sulfamic acid to help neutralize the salts.