If you're concerned about weathering while stored at home, I've heard of using a section of aluminum gutter. Not easy to put in place, but very good protection if it'll be on there months at a time. I don't remember how it was fastened. I'd think something could tie it to the arms.
When the top edge of our old A&E awning turned to potato chips and came loose, we took it off, roller and all. Bought "Top Gun" boat cover fabric. Pieced the 54" wide material till we had a foot and a half or so, length of the awning. Took cord out of old awning and sewed to the Top Gun replacement edge. Then measured carefully and cut away old awning to where the repair piece would seam in place. Two of us walked the awning roller with fabric still rolled onto it, past the person at the commercial sewing machine. I was worried how the joints in the Top Gun would slide in the track but no worry. I didn't care the top foot of the blue awning was gray.