I had the 3M Invisible Shield installed on two of my vehicles 5 years ago and although they have done their job protecting the surfaces , they have turned yellow and it looks like orange peel.
For my 2000 S I went with 3M latest product called
Scotch Guard Pro. I purchased the kit from
https://www.invisiblemask.com (Hood, lights, fenders and number) it comes with a free installation kit and it turned out great.
I just ordered some bulk material so I can do the same area in your picture. I recommend purchasing the insurance, as I had to do the front bumper twice. Even with the additional cost of the 2nd bumper the job still cost less than having a pro do the install.