I'm mounting sheets of Fabriano onto aluminum to ensure stability, for three-colour gum printing. The product I use is Fusion 4000, which is made by Seal and is a semi-translucent 'plastic'. It's completely archival and removable. You just place the finished print back into the dry mount press at a slightly higher temperature and slowly peel the print away from the aluminum. It's available through University Products. www.universityproducts.com