Creating a high impact graphic can be a challenge. How do you support the image, how do you produce the image, and most importantly, how do you ship something that BIG?
Almost all of today’s aluminum extrusion makers (Octanorm, AGAM, etc.) have a gasketed graphic retainer. This is a small groove in the extrusion that accepts a silicone rubber gasket. The gasket is sewn into the perimeter of a fabric graphic which can then be inserted into the extrusion retainer. Kind of like making a window screen, or for you old-timers, me included, like stretching a screen for screen printing.