All I know, is that I saw a photo of a piece of Rimowa luggage that was pinkish/purple/reddish color and had peeling on the outside with other issues. It didn't exactly look like an aluminum one but could have been. It just put me off from buying any color ones. So that's why I have an aluminum one. It could have very well been a colored aluminum one, but for some reason I thought polycarbonate when I looked at it. If I'm able to find the photo on the flytalk forum I will post it here. I tried looking for it but couldn't find it yet. There was another rimowa thread I think it was posted in not this thread.