If you do not have the monocote and the covering iron; I have neither so
1) I took a measured length of HD 3M packing tape, and put it onto a section on non-stick paper like what the decals come on;
2) figured I wanted 1/2" inch adhesivese sticking to the forward top side of of hinges; measured the width of the hinge depression (45 degree slopes) and added an additional 1/8";
3) cut tape to width;
4) expose the portion you want to make non-sticky. Sprinkle with talc, rub in, shake off excess;
5) carefully align and apply;
6) press down gently and work any air bubbles to sides.

Unconventional maybe, but it may be a long time before I would have access to the tools and monocote so.......... it should work to stop any flutter.