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					Originally Posted by  Destroyer
					 
				 
				MaryKate On & Off hull and bottom cleaner.  Serious stuff...follow all directions and use protection, but it will remove stains like nothing else, and will not harm fiberglass.  This stuff contains a combo of hydrochloric, oxalic and phosphoric acids, so be careful with it and ONLY use it outdoors... NOT in a garage.   It does NOT contain Muriatic acid.  Gloves, Goggles, long sleeve shirt and pants, and a Vapor Mask are manditory. 
			
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 Wow -  I heard a guy sprayed this stuff on his boat hull, then went back into the house for bathroom break.  When he came back out - his boat was gone, and there was just a huge smoking hole in the ground where it had been !!
Now that's what I call a powerful cleaner !!