To keep paint and even CA out of a hinge joint dip hinge barrel in heated Vaseline. I put the Vaseline in a jar lid just deep enough for the hinge barrel to submerge itself when bottoming out. Fold hinge back upon itself and squeeze/flex hinge so the heated Vaseline will wick better in the pin joint. Set aside to dry and wipe off excess Vaseline off of hinge joint.

Vice Grips are used to hold lid while heating with propane torch or heat gun. Place Vice Grips in bench vise. I usually get the Vaseline smoking a little bit before dipping hinge. Better wicking action.

The Vaseline is used since it will not migrate like other oils will and contaminate the hinge tab.

By using this method you will be able to use thin CA to install hinges. Although on a jet or larger models I would use epoxy or the other methods listed above.

Try a test sample with thin CA for medium sized models and you will be surprised how you can make a flat tabbed pinned hinge become a CA hinge.