I am pretty sure the 2006 Buick LaCrosse(at least in Glacier Blue Metallic) has a scratch resistant clear of some sort. Purchased in late December 05' by my grandparents, it has held up through dealer prep, one swirl-omatic car wash(with brushes), and some less than ideal washing tools of my own (pre-autopian), and has very minor swirls and marring(read: virtually none). I look at it under various lighting(under full sun with sunglasses on, halogens at angles, etc.), and still have no reason to do any type of deep polishing to it yet.