DS is off to uni and his hall handbook says no blu tac or adhesive fixings (including command hooks, presumably because they pull paint off if you don't remove them properly). There is one small notice board in the room, but otherwise it's very bare and I'm sure most of the students will want to put something up, risking having to pay for a re-paint at the end of the year. I know you can get white tac alternatives to blu tac, which claim to be non-marking, but when I've bought them years ago they sort of melted onto the wall after a while, were very sticky, and did leave greasy marks. Does anyone have any recommendations?