I also scratched the living hell out of my roof by using it to transport a large kayak on top (I place 3 swimming pool noodles underneath the kayak and then ratchet straps to secure it to the roof.
Be really careful because the paint on the roof it the most fragile of all and if the neighborhood cats start sleeping on your roof it will be really bad.
This is the first car I have owned that I would consider to shoo away a cat at 3am from sleeping on the roof of the Mirage