those rear flare pieces won't be enough.Hal, making an appt this week! They already have a patch of PPF on the front of the rear flare. I installed the ZL1 mud guards already. Don't worry dude, she'll be well protected!
My friend drove up in the mountains and there was dried salt / sand on the roadside (it had snowed weeks before) that grit pitted his rear flares above factory applied film - just on one drive.
so he had the pits touched up and full PPF applied