Haha, yeah I thought of that ... don't worry, in a pinch I used a piece of that polyfil out of the subwoofer mod to protect the finish!! j/k!!! Where's the coaster!! That'll leave a ring... :S lol
...And I thought it was just the stock f1 rubber not likeing cold....
Seriously, though, I think I only had it on there long enough to take the picture because I was actually worried about the mark, haha!