Hi chaps,
Been asked by a customer to have a look at his kitchen floor which is slate. He said first of all that it had never been sealed, but after I tried cleaning it with a neutral detergent and a rotary (which made no difference) he said he seemed to remember the tiles were pre-sealed before being laid.
Almost the whole floor has gone very white, he blames this on the people who laid the floor, an when they grouted, they didnt come clean the grout residue away. As mentioned, I went over it with a rotary and neutral detergent, then rinsed it using my TM and wand.
I stupidly left my stone cleaning acid at home, but before I go back there to try again (its almost an hours drive!) - is going over it with some QMT (Prochem) diluted likely to get rid of this residue?
I've attached pics (which actually make it look a little bit worse than it is).
Appreciate any help.
