BMC M1-100 Polishing Powder for marble and limestone, 100 g bag, for treating dull, light corrosion stains on mirror-polished surfaces. For manual application

It took more like 30 minutes of manual polishing to get rid of a 15 cm x 1 cm arc of dull etch marks caused by water to a mirror like finish olympic marble window sill. I almost resorted to looking for a polishing wheel for my drill but noticed a slight improvement and persevered. The marks are gone, just leaving the uneven minor surface if you look very closely. Stone polish compound and a stone sealing fluid, recommended by the supplier of the marble, previously had no effect on the marks.

It doesn't do anything, it damaged the marble even more.

good product and would recommend

Used in accordance with instructions and after scrubbing it did not remove ground in discolouring. Removed top layer of dirt only.

Have only tried this small amount on one marble tile. Certainly does the job, but is hard work and will need much more to do all the kitchen.

just not very good

waste of money don't bother

Bought to help clean marks off shower - did exactly as written on the instructions but didn't work.