Head used it in some skis - only time I saw it in use, but they removed it again in newer models.Graphene has so many fantastic qualities that it is easy to see why a bright future was forecast for it. But since then, nothing!
I reckon the military/government cabal has tied up all the production capacity, and the Patent Office is sitting on all the developments thanks to a "D" notice issued by the government. They are, of course, developing spaceships!