I found this thread and thought I'd add my cattle panel arbors. I have built 4 of which 3 are in my yard and 1 at the school I used to work at.
I grow roses on this one:
Ipomoea indica (morning glory) and wisteria on this arbor at my gate:
I currently don't have anything growing on the 3rd one in my yard. It is currently being used as the squirrel ladder for them to get into my yard! LOL!
I also used cattle panel on the sides of this mini-pergola. I have coral honeysuckle growing up both sides for the hummingbirds: