[MarkCalvillo]

Hey Anthony,
looked @ picture. An acidic powder would work and remove the light dullness and possible scratching pretty easily.

I'm not a big fan of the 5X though...

All powders have two parts. A mechanical (grind) part and a chemical (polish) part.
5X uses a tin oxide as a mechanical part and a potassium oxalate as a chemical part.

The tin oxide is a flake product which cuts on two sides. And, because it is a flake it does not remove damage as well as others. It disolves quickly too. It also fuses together and creates an abrasive crystal which may then "scratch" the surface you are trying to polish.

You know what I'm talking about, you see the chunky crystals.
5X is an old technology which is a derivative of old/unused 5X brick.

The potasium oxalate is a hot polishing powder. This hot powder is used to off-set the lack of abrasiveness the tin oxide provides. So, with the hotter powder you have more of a chance to "burn" your marble surface or...at the very least, the spatter marks will sit on the polished surface and leave "burn marks.

It is an old school product which is too inconsistant and requires too much care to get it to work properly. Many people who choose 5X find themselves sifting the 5X powder just to get the "rock" crystals out.

Way too much work and concern when there are other powders which are easier and more effective to use. Especially on darker marbles.

My suggestion,
Find yourself another powder.

I suggest Diamond Renew Polishing Powder.

This powder uses an extremely fine synthetic diamond abrasive as the mechanical (grind) part. This synthetic abrasive has no less than eight edges for better "grind" action and in the process it will wear down slowly and into a very fine grit. This allows it to be worked from an aggresive size to a finer size removing most scratches, consistantly and gradually, until they are all g-o-n-e!!!

The polishing part is a magnesium flourosilicate (acid) which works with the calcium carbonite (marble) and leaves the surface crystals highly reflective.

Best of luck. Any replys can be made public. If you want to know where to get this powder IM me and I'll get you the number...this is not an advertising thread.

Thanks for reading,