I'm also interested in displaying prints without glazing (not behind glass or plastic), but I haven't found many resources on this (beside spraying the print and/or using a press). Where can one learn more about the pinning, magnet or other techniques for glass-free presentation?
Brad, that's what I've been doing for all of my recent prints -- matting and framing but without glass. (One might ask what's the point of a mat when no glass is being used; well, I think it gives the print some space and makes the presentation nice.)
For the most part, I've been matting and mounting exactly as I would for doing a print behind glass -- except that I leave out the glass/acrylic. Specifically, I mount a print using t-hinges to 3/8" foam core, then place a double-mat on top of the print and attach it to the foam core. This works well for thick rag papers which tend to stay flat. Even when they ripple a bit, it's very hard to see in practice because the surface is so diffuse. (Unfortunately my eyes/brain are quite sensitive to not-quite-flat surfaces.)
For thinner papers or for papers which are more prone to curling/rippling, I cold-mount using the CodaMount double-adhesive sheets. Instead of using a press, I just use a long, heavy mailing tube or pipe to apply the pressure over the print from one end to the other. I usually place a big sheet of acid-free tissue paper over the print before using the rolling tube. Here in Boston, the humidity fluctuates like crazy over the summer and even mat board can be prone to warping. Cold-mounting the print keeps it flat and ripple-free.