Unfortunately, I've found more rust - this time in the rear seat (lugs for the fold down component).
I emailed the dealer and they advised to bring it in and they'll get the rust removed. I replied that I am not confident that all of the rust has been identified - what about all of the steel parts I can't see ? And I am unclear as to the cause. I am awaiting a reply and will advise when I do so.
This has not helped in my perceptions of the quality of my vehicle.