Youre probably not going to find stress cracks in a Pearson hull as the Pearsons knew the proper ratios of glass to resin with which to lay up. ... and thats how they became the 'masters' of lightweight solid hull construction in the 70s.
However, such solid layup is subject to FATIGUE ... and such fatigue is additive and renders such a hull to a 'defined service life'.
Suggest you do a websearch for - "Fatigue endurance of fiberglass hulls (US NAVY)". Fatigue in a hull will lead to sudden catastrophic failure. Maybe JeffH can be encouraged to add some comments on the needed parameters on a hull to prevent FATIGUE, etc. Thats why the P30 isnt going to be a good 'ocean boat' --- the hull is 'too thin' and the load cycles on the hull will be FAST and tremendous. For ocean sailing youre going to need a boat that is built 1.5 to 2 times the STRENGTH of P30.