I have not read all the posts about photographing, this could have been suggested.
I bought a 4'x8' piece of plywood, and a roll of metal flange (I think this is what it was called), these are about 1' wide. I cut the strips the length of the plywood and secured them with liquid nails, covering the entire sheet with the metal surface. I then bought some strong square magnets. I have put paper over the metal the size of a one sheet as a guide. You can then put up any poster up to 3 sheet size with the magnets and not damage the poster. Of course you don't have to use the full size if you don't have a need for it.
I don't know about your lighting situation. I am in a warehouse setting and have an overhead fluorescent light and have to shade it some. I do get a glare and you will have a glare from the metal on some situations.
Hope this helps.
Tony
