Let me see if I got this right. Your testing to see if it is only gel coat deep and if so then the issue is cosmetic? Does it make a difference that the outer hull has no indication of cracking and that is is only an inner lining shell? In the cockpit lockers where the is no liner and you see the outer hulls inside the glass is fine, of course it's not gel coated either.
Thanks for the testing method.
That's what I was thinking.
It's a LINER!!
Even a hole wouldn't becessarily mean anything in a liner.
Except poor housekeeping!!