The corner of the wing is actually a flange, ie behind what you see is a lip that should be attached to the scuttle flange.
Changing tack slightly here what's the front of the wing like especially around the headlight and where it meets the front panel??? any rust?? if so it will pay you to replace the wing.
The front of the wing is perfect. Just hope the corner isn't too bad, after a thorough inspection
For rustproofing Dynax S50 is light years ahead of waxoyl.
Thanks for the tip
