For those who keep on scraping, I suggest taking a dremel and cutting away the lower portion on the sides of the plastic spoiler beneath the bumper. We did that at the shop, per my request, and it came out perfect.
See pic here:
http://i.imgur.com/OCO05.jpg
Not linking to it since it is gigantic so you can see the detail.
Take about half an inch off the ones below the fender, as well.