I can tell ALL now, it's not Zinc Rot as these planes wern't made with zinc/zamac but with Aluminium. Phoenix models use a high pressure aluminium diecasting moulds for their castings. The bubbling is more likely due to improper cleaning of the wing surface, allowing contaminats to settle before painting. The bending is likely from these same contaminats causing "Powdery Rot".
It's a recently new condition. Here is a link to a similar situation already discussed on DAC about Powdery Rot affecting 1:200 models made of Aluminium. It's very interesting reading - though worrying..
See post 106 for a detailed explaination of what is Powdery Rot.