The beacon sticker says that after 45 mins, it will stick permanently. Is there still any hope of detaching it after 45 mins? If so, how? I don’t suppose I have to scrape off my wall or completely destroy my beacon in order to detach it?
Very unlikely you’d destroy the beacon in the process, they are actually very durable! But quite likely that the wall itself will suffer, i.e., the pain/plaster might come off.
The deal with adhesives is, they’re either super strong and your beacon won’t fall down, or they’re easy to remove, but at the risk of the beacon falling off the wall by itself. We chose the former, but if you need something more temporary, a regular two-sides tape you can buy in any store should be a good choice.