I've been using a West Marine hull cleaner that is a blu-ish gel. It has worked reasonably well but I heard that E-Z Off works better- but is caustic to your skin. 
I'm not sure if I heard the guy correctly so it might be another product with a similar name.
Anyone tried it?
Peter
				
			I'm not sure if I heard the guy correctly so it might be another product with a similar name.
Anyone tried it?
Peter
 
	 
 
		 
 
		