Got an answer from the factory - explains some things and has a solution for uncured gelcoat. Here goes-
"... Not knowing what the smell is, anything I pose is somewhat of a guess. We have noticed some tacky gel coat in lockers on some of the boats out of California. We believe this to be a wax that was added for the purpose of curing not doing its job properly. We have solved this by switching to a urethane based gel coat designed specifically for bilges and lockers. If you have this issue on your boat, you may consider coating the interior of your lockers with a marine polyurethane paint to seal in the gel coat..."
Every little bit helps....
PSC 40 #60