Some clients are interested in this product (Rock Solid, Inc. coated concrete covering):
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It's apparently an overlay of limestone plaster applied over existing concrete, with a bond coat in between. Can be finished to look like almost anything--fieldstone, flagstone, terrazzo, etc.Stuff is not cheap, because lots of labor, but looks like a possibly economic alternative to other surfaces.
I looked online for any reviews of this product but couldn't find any. Anyone here know anything about this stuff?