Does any one know the proper way to handle vintage posters that have been mounted in some fashion to canvas backing? I have seen a few of these and have one in the shop to frame now. The poster itself is about 33" x 43" with about 1 1/2" of canvas exposed on the edge. I plan to treat it like a piece of paper art with hinges and matting and perhaps sewing the extra canvas to the mounting board, but maybe someone has a better idea. Any suggestions would be appriciated. Thanks.