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Limestone cleaning starts with identifying the surface and the likely cause of the soiling. A dark mark could be dirt, algae, lichen, mildew, or another stain, and guessing can lead to unnecessary scrubbing or stone dama…

More pressure isn’t always the way to a cleaner patio. On natural stone or around paver joints, it can leave pitting, scarring or missing sand behind. If stains and outdoor grime have made your paving look neglected, kno…