Here's my worthless two cents:
The areas that are outlined in red are the areas I would put clear bra on no matter what.
- The shaded red areas I would do immediately. I wouldn't drive the car without them done. You've been warned.
- All of the red areas are in the line of fire. The area in front of the rear tire can also sustain serious damage under hard use.
- I included the small triangle that has the keypad because it's polycarbonate and that stuff scratches super easy without nearly as much opportunity to remediate as the rest of the paint. The a-pillar on most of the cars is going to be gloss black, so same situation.
- I would especially apply the same theory to all the carbon fiber lowers if you have them in gloss black. Satin Exposed CF is more forgiving, but if you have the gloss black and it gets whacked, it will be a nice white dot. Then many white dots. Those got absolutely destroyed on the hard track use cars Ford has.
- I put the hood in yellow because I haven't seen too much damage there, but that's a Murphy's law area. Same with hood vent areas. I once watched a giant rock kicked up by a truck arc through the air and land right in my 06 FGT hood extractor, of course removing a fingernail sized chunk of paint with it. Yay.
- The two outermost fin areas of the rear fascia/diffuser also get drilled. Would definitely do those.
- I would do a base layer of PPF behind the rear wheels and then perhaps add a second piece that you'll expect to replace. Or if you're going to the track, use that tracwrap shit I used.
- I would at least do the top and leading edge of the wing, as it's high when up and tilted when used as an air brake.
Sound like enough? I think both the cars we have here now will have the underbody done. At a minimum, the whole keel area where the LCAs attach. The "shelf" in front of our screen fills with rocks. It's exactly the same on the Porsche 918. You go 50 feet, you have pebbles there. Double clear bra it, get the screen, then blow it out after a drive with compressed air. Pain in the ass? Yes, but it's the cost of all that stuff being so pretty.
Personally, I would just basically do the whole car. Or at least the majority of the car. The roof and the rear decklid are unlikely to get hit, as are the tops of the rear fenders. :willy With the clarity of the PPF available now, and how f-ing nice all these components are on the GT, I'm just committed to doing it.