Well I used to sail a club hobie 16 before i bought my own and i noticed a soft in the clubs boat and well of cource i had to repair it. I asked around and the best advice i was given was to sand the top of the soft spot down heaps and recoat it. It might make the hulls hevier if you use the wrong stuff but it's stronger that way and since its an old boat it shouldn't make much difference. Well at any case have fun and just get advice from other people and dont just follow one thing just do what you think is best its all learning.
form julian
(I maybe young but not stupid thats for sure)