I'm not all that experienced in telling what is normal stress cracking and what may actually indicate structural damage.
I was looking at used boats recently. A buddy of mine gave me tips on what to look for that might indicate a problem. So I did some research to help understand exactly what "gel coat" is and came across an article that helped me. For what it's worth it's at:
http://www.cfa-hq.org/documents/GettingAHandleonGelCoatCracking.doc
Hope this helps until someone with experience can direct you!
TSLTW
I was looking at used boats recently. A buddy of mine gave me tips on what to look for that might indicate a problem. So I did some research to help understand exactly what "gel coat" is and came across an article that helped me. For what it's worth it's at:
http://www.cfa-hq.org/documents/GettingAHandleonGelCoatCracking.doc
Hope this helps until someone with experience can direct you!
TSLTW