Sandstone stains Mike Marsoun 15 Nov 2012 21:02 EST
Hi Guys. I'm doing samples, testing cleaners, it is an Indian sandstone. It has to be100% clean because it will get sealed with a RJSC coating. The best cleaner was Klemztone (no surprise) but it still did not get out some stains. Any ideas on a system to remove these before or after the cleaning.

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