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nenomarie · **Posted: 30-03-2009 , 07:18 PM** #2

hi, I remember seeing someone on tv Grand Designs restoring a castle and the ancient stones were all green and they got it off with just a high powered power washer, it took them ages but it worked really well, not sure if this helps but good luck!

	Posted: 30-03-2009 , 07:18 PM #2
nenomarie Member Join Date: May 2007 Posts: 42	algae hi, I remember seeing someone on tv Grand Designs restoring a castle and the ancient stones were all green and they got it off with just a high powered power washer, it took them ages but it worked really well, not sure if this helps but good luck!