Another local Cornish company , Sustainable Composites , developed a resin made almost entirely from linseed oil instead of oil - derived coatings .
Over 50 percent of the final finished surfboards are made from renewable materials .
Another local Cornish company , Sustainable Composites , developed a resin made almost entirely from linseed oil instead of oil - derived coatings , meaning over 50 percent of the final finished surfboards are made from renewable materials .