I am thinking of buying a 1979 fiberglass sailboat with divinycell as the core material in the hull. I have heard of balsa cores and airex but divinycell is new to me. I've googled it but does anyone have any first hand experience either building with it or maintaining it? Is it still in use? Does it hold water if osmosis is occuring? I'm afraid I don't know which variety/weight/density of divinycell was used. Any help much appreciated. Thank you.