@Lemain;
Well spotted but I think it IS just the lighting.
Not as easy as that; either one or both of the images has been "doctored" to promote whatever was being promoted.
The "adhesive" method is most likely to be what was used, and without testing the bond in sea water for 16 months, that statement could also be ruled out of order.
Let's be a little more positive and accept that a flaperon has been found, and at this time concede that there is possibly some doubt as to its origin, but proceed positively. A kick in the back-side may come our way in the future, but at least we can't be accused of just being "nay sayers".