My idea is something like this:

Using just a black backing and then putting the marquees onto them. The problem is, how can I mount it without risking damaging the marquee when I switch them out? My best idea is using the sticky tack stuff, but the white kind; the ones that don't leave residue. But, I still think after being on there long enough I would risk tearing the paper taking it back off as I have encountered that before with posters.
Does anyone have some good ideas on how to mount these marquees properly without damaging them?
Thanks!