In the interest of generating some interest in this section and genuine curiosity. Anyone using Cheetahs and find they actually work? Not talking about on travertine as that can be done with a brush and some powder or an 800 grit pad. Anyone actually tried it on a polished marble and found it works (not in a class room or previously ground floor) from what I'm hearing so far they ain't great, with one exception saying they were brill.