Hey Mike
This job I did (see pictures) may be similar. The signage had a water feature hitting it causing the same problem. They decided to stop the water feature and fix the sign. We first took straight razors and removed the bulk of the mineral stain, then polished it with Hertron ultimate black polish, then last step was black stone wax. This sign was about the fourth one I have done like this and they always turn out well.

Hope this helps
Randy Frye
Cleaning Edge, Naples FL


On 4/13/10 12:49 AM, "Mike Marsoun" <nulifesc@bigpond.com> wrote:

I am being asked to bid on several water features with polished black granite, medium to heavy mineral stain build up. Sampled some abrasive cream cleanser, and it somewhat worked. Any other ideas?  
 
I wrote an article on using AO paper pads which works nice, but I really don’t want to do it and they will not understand if I give them a price.
 
Trying to train them in a way to maintain, …
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