Happily this did not happen to my NSX, but it did happen to my Integra (No, I did not do it). The sunroof was left open in the rain and the seats got soaked. When they dried they shrunk and got very stiff. I am putting the Zymol leather treatment on them, but it does not seem to be helping much. Does anybody have any experience (NSX-T's?) with this type of problem and what did you do?