Like shite on the wall

Alpha Bank HQ, Pesmazoglou & Panepistimiou Str., Athens. Poultice cleaning of a marble veneered gateway. Job went fine but my bosses thought otherwise. They 'let me go' coming up with a bunch of either groundless or ridiculously contradictory accusations. Well, if it's any indication at all of their administrative skills, they haven't even paid me yet, ten days after sacking me.
Does shite or bentonite slide down a marble wall? The answer is, it depends on its consistency...