I have a 2016 Hellcat that has been completely wrapped with XPEL paint protection film. The vendor who did the work did an excellent job detailing the car and then applying the film but wants to go a step further. I should mention that this work was done about a year ago. He now wants to clay bar the entire car to enhance it even further. If it bears mentioning, the color of the car is (Chrysler) Pitch Black. My questions are these: Should this be done at all? Is it even necessary? The cost is not a factor because he is doing it gratis because he owes me a favor. Anybody have any ideas or serious comments?