6. Lichens and algae can be removed by first thoroughly soaking the stone and then using a wooden scraper to gently remove the biological growth. This process may need to be repeated several times. CLEANING STONE - Floor cleaning - Document - PDFSEARCH.IO

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	6. Lichens and algae can be removed by first thoroughly soaking the stone and then using a wooden scraper to gently remove the biological growth. This process may need to be repeated several times. CLEANING STONE Add to Reading List Document Date: 2014-12-10 22:30:45 Open Document File Size: 80,47 KB Share Result on Facebook

6. Lichens and algae can be removed by first thoroughly soaking the stone and then using a wooden scraper to gently remove the biological growth. This process may need to be repeated several times. CLEANING STONEAdd to Reading List