Aluminum photo prints are vibrant, scratch resistant, and don’t require frames. Could be an excellent solution for printing a final render.
http://www.magnachrome.com/
http://photography.about.com/od/displayingphotographs/fr/Review-Of-Chromaluxe-Metal-Photo-Panels.htm
* See more at the Guerrilla CG project: http://www.youtube.com/user/GuerrillaCG
Check out Complex Geometry’s Facebook page at: http://www.facebook.com/ComplexGeometry
–or their website at: http://complexgeometry.com/
