I have a GP P-51 (Gunnin' for Glory), only a few years old. I had a similar problem, with the covering, I was putting it in the truck, and tore off the wing tip, and ripped the covering. I used Zaps Goop glue to fix the tear and reattach the tip. It dries clear and seals the covering. Make sure you clean up excess glue right away. And you will have a great repair. Mine flies and looks as good as new. Hope this helps.

BC