Happy to hear you found a resolution even if other methods didn't work out. I'm familiar with E6000 only after assembling a nearly indestructible electric delta pusher made of Corroplast called a Hog Wild which called for same. Sounds like it will work as well or better than traditional methods...

Are you the original owner of the Chipmunk? Speculation and my only thoughts are that maybe the plastics age and don't bond well after years sitting or that maybe it was stored in an environment where the parts were exposed to something inhibiting the bond with CA adhesives?

Which size Chipmunk do you have? I remember at least three different sizes... Not sure its the same way after a quarter century but I always thought the third best odor known to mankind was found upon taking the top off a brand new O.K. Model Company EZ box or any Japanese kit for that matter. Its all about the smell you know; just ask any dog...

FWIW and in case it hasn't been stated previously, I found that minor dings, dents, and creases in the laminate skin could be removed or at least lessened by judicious use of a heat gun. Realize that some shrinkage will occur and be careful not to dwell too long in one area as you may melt the layer of foam just below the surface.