Clear or Invisible Bras (3M 8mm clear cover) are no different than your clear coat, your head light lens, etc. If you regularly wash and wax your vehicle then they are not going to yellow. If it ever did, you would only have to use an abrasive cleaner polish to bring it back up to new condition. My entire front fascia is done and I've had the Invisible Bra on for well over two years without even the slightest amount of yellowing.
Chief
I love the look you got goin' on there Darth. My favorite E in all of EOC!
You are quite right on the wax front, and I asked the wax question about my clear-bra and was told just to keep in mind that the color of the wax <may> absorb into the clear-bra material. With that in mind either clear wax like Turtle Wax Ice (clear version), or a white base wax like another I've used on my clear-bra, "Black Magic". Both of these have no effect on color absorbtion that I can see.
I've had my clear-bra on for three years covering the full front end, and full hood, headlamp and fog lenses, and along the leading edges of the rear wheel wells on the painted surface too. No rock chips, and still looks new!
If you are starting with a fairly pitted hood leading edge, this material will obviously stop more from occurring, but might not be worth the cost for you.
Here is just one place that sells the pre-cut material, but I am not seeing the full hood material here. Usually the local new Honda dealers can point you toward a good install shop.
Good luck, and hope this works out for you.