I'm guessing that is a typo on your third word. The SunHut must have rusted the frame together? That would be an advantage of plastic corners.
Yes a typo, meant now.
The sunhut wasn't rust. It was the fabric itself, after a couple years. We just could not un-assemble it. We couldnt get any stretch in the material to pull over the frame. Eventually we had to cut it apart with a knife, to get it down.
The secret Jardin's frame isnt so tight, I have been able to take it down and re assemble on my own