I need to fix a Artemide Demetra Parete (Wall) lamp. When it was hit by accident, its arm swung against a cabinet standing next to it apparently hard enough for its cover disk to come off. As you can see in the two pictures, the cover was apparently fixed to the base by six glue spots. For what I can determine the body is made of metal, the cover of glass.
My question is this: what sort of glue (or other mechanism) is used by best-industrial-design-practice in such cases? If it is indeed a glue, it has work with metal and glass, tolerate a heat source close by, and allow removal by repair staff without a hassle.
(Don't pay attention to the white traces visible in the 2nd picture: they stem from preliminary attempts at repairing with perhaps ill-suited material that was at hand.)
UPDATE Four of the six posts are slightly higher. Their tops are metal-colored (without paint), the other two tops are white (like the rest of the body). There are no traces of any alternative material on any post. If there was any such material, it may have come off when the cover fell off, but it would seem unlikely that this happened everywhere at once. There are also two small notches adjacent to the lower posts, perhaps their only purpose was for inserting the cover at the right angle of rotation.