but i have to do a subway restaurant as part of a carpet job ...
Its mainly the black dirt in the grey grout lines ..
what would be good and quick to break down the grout dirt ... i poked it with a
blade its rock hard .
I can get speed stripper ? would that dissolve the black quickly ?
I would have a multiwash , a lowspeed rotary with pads , a bristly hard floor wand ( never tried it ) . Should i try and make a long handle grout brush or would a deck scrub do , dont think i have time to pick up a proper grout brush , also not sure if the black brushes on the multiwash are aggressive enough but perhaps when its dissolved it will .
Would u put a finish on these tiles ... i have not being asked to .