This is not a disassembly problem. If I have an original flap, it does not wrinkle.
What you are talking about is tearing off the paint when removing the tapes from the original flaps or when disassembling (incidentally, the black flaps have the softest paint) .. I do not tear the tapes from the originals, because there is less than a 50% chance that the original tape will not come off together with paint ... I damaged in this way from 4-5 golden flaps. In my opinion, such tapes will only be used warm. So I just clean the adhesive off the tape with isopropanol, cold, and pour b7000 on the seal.
I almost always tear off the tapes from non-original flaps (they barely stick), and the b7000 glue then wrinkles the foil at the point of contact with the flap / glass (non-original).
This is not a heating problem, because the camera cover and the flap stick "when cold".
My guess is that you had this heating in mind when dismantling the old tapes in the originals. But here it is about replacements and gluing this crap. Nothing wrinkles the original.
Apparently there is this Pattex Total in castorama. Tomorrow I will post whether it is better glue. Apparently, it dries roughly in an hour, cures under the influence of moisture in the air and is solvent-free, which - I suppose - in the b-7000 is responsible for this wrinkling. It is also quite cheap: 50G PLN 16-17. It's only 2x more expensive than the b-7000.