My two cents worth
Hi Swinging Spanner.
Like you, I think that the theory of resonance causing this problem is a bit of smoke and mirrors. There may be some truth in the fact that resonance may* occur and failure may* result. (The asterisk * denotes only under specific and ill-defined circumstances, a bit like Macdonalds Big Mac is healthy* food*.)
I suggest that another possible explanation is that failure occurs only because of the weakened adhesive bonds caused by the same micro-voiding that causes the boom disbonds. This is a processing deficiency caused by poor environmental controls during manufacture. Moisture absorbed by the uncured adhesive during fabrication evolves as steam, resulting in an excessive number of small voids. These reduce the strength of the bond. Reference data shows that peel strength may fall by as much as about 60% due to short term exposure at 29C and 80% RH.
Now your paint blister issues may have similar causes. Please PM me your email address and I will contact you.
Regards
Blakmax