We used magnets in a little different way. We would embed the magnets in the surface that the art was to be mounted to, and would put a strip of felt over them all to provide a buffering surface and promote friction hold. A strip of fairly stiff (16 gauge) sheet metal backed with the same felt and painted to an appropriate color, would them be placed on top of the magnets with the art between the layers. In this way, the level of hold was more consistent, and visually, the strip was a less obtrusive element than the individual magnets. The strip is also much easier to safely remove at de-installation.
We were using this on textiles which had a tendency to scallop with single points of support. I'm not sure if this will have sufficient strength to support your paper works, but number of magnets and choice of padding material will determine much of that.
Reply With Quote