I wouldn't call that coming off. All covering tends to bubble in sun. Once you shrink it back a couple times with a heat gun it does it less. I know what you mean about the fuse softening though. I have a CMP lancair that I left in the back seat once and it got hot enough to twist the fuse. I heated it up again and twisted it back, but I am careful from now on to keep the CMP planes out of the windows. Just sitting in the sun outside they get hot but I have never had any problems, now if I lived in Arizona I might be a bit concerned.