Sikaflex tis the Devil's work! It really will stick anything to anything, just make sure you don'e ever want to remove it! As Andy says, strap it down while cures, and it should be fine. I would try to give the ali some form of shape first though, rather than just bending it around the scuttle frame, bonding it and strapping it, as the skin will then always be trying to spring itself away from the frame.
Cheers
Adrian
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