Join Date: Jul 2000
Thanked 249 Times in 235 Posts
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If DACRON sails and if you're going to 'wash' the sails anyway .... lemon juice will dissolve the 'verdigris' (various complex forms of copper acetate/oxide) on the bronze hanks ... just 'partition' the hanks away from the sail cloth with plastic film (saran, etc) when 'soaking' in the lemon juice so that the loosened verdigris doesnt 'transfer' & become embedded in the cloth. Be sure to rinse well.
For the staining from the ss (???) grommets, its probably 'rust' from the ss .... then a soak with oxalic acid (from a paint/hardware store - sold as dry crystals) will quickly remove any 'rust' staining (plus tannin staining). Usually its best to 'wash' the sails with a caustic/alkaline detergent to remove grease/oil/fungus before bleaching with oxalic. Again be sure to rinse well to remove any oxalic acid. Be sure to use 'protection' when using oxalic acid ... absorbs through skin quickly and can do great harm to your kidneys. Oxalic Acid is usually available in non-eco-frenzy, non-chemophobic states.
Again if the sails are woven polyester/dacron, such is quite stable and resistant to most 'inorganic' chemicals and solvents. .... not so with many 'organic' solvents, etc. (gasoline, kerosene, MEK, 'paint thinner', etc. etc.) ... Avoid! do websearch for "chemical compatibility" + polyester if in doubt.