Is this a necklace pendant? If it is a necklace pendant, you might want a glue that is waterproof, in case of rain outside. About the materials the cross or the Jesus is made out of, I am not sure, though the Jesus figure appears to be made out of steel or iron.
Yeah I’d say Gorilla Glue make sure to get the gel type.
How do I remove the old glue? Doesn't "rough up the metal" mean damaging it? Why is that necessary?
I wouldn’t rough it up if you use gorilla glue but you do need to clean the metal with alcohol to make sure you get any oil off of it and don’t touch the areas your going to glue after cleaning it. Just need to clean the areas that you’re going to apply the glue to.
Well, as a kid, I made water rockets for a class. We were told to rough up the plastic bottle, so that the glue bonds to the plastic better, which allowed the fins to stick better to the rocket. We used a manual bike pump to add air inside the soda/water bottle to launch the rockets, and the forces from launch could tear the fins off of the rocket if the surface the fins were attached to was smooth.
