I have a pair of Voit Duck Feet fins that have been in storage for a couple of years, in a large plastic container. They have a brownish discoloration that has a rough surface to it. I tried to wash it off with mild detergent but no go. They have only been used in fresh water and the dive shop pool. Could chlorine cause this? I am careful to rinse my gear after each use. I have a pair of Aqualung Rocket fins that were in the same container with no signs of discoloration. Any ideas?
Thanks,
John