For pinned hinges, I usually fold it, and dip the pin side in vaseline (Just get a tiny bit of vaseline on it) then heat it with a match and the vaseling will melt into the hinge to protect it from the epoxy.

Then, scoop up some (at least) 30-minute epoxy into a plastic drinking straw. Flatten out the end of the straw, insert it into the slot and squeeze just a tiny bit into each slot.

Then spread just a thin film on each hinge, insert them, make sure they are all straight, etc. and clean the area with alcohol and a paper towel.