paint color is part of the film choice
We did this on a metallic black 745Li with excellent result. The line at the edge of the film, which was about 1/3 back on the hood, was barely visible; then only under certain lighting and angles. Believe me, I wanted this car perfect! As with any edge, it can be more visible due to dirt or leftover wax.
I watched the expert application, which was done in my home garage before the paint had any pits, but after it was cured fully. There are a variety of films that serve this purpose, 3M being one. Do your homework on this and you will like the result. I have heard that the 3M film is not as transparent as others, but am not an expert.
A big part of this task is a properly cut (fitting) mask. Equally huge is the application, which on a flat surface, just about anyone can do, with good result. On complicated body parts, i.e. complex curves, the application of a good mask approaches an art form.
I recently did the headlights on our Smart. After watching the window tint guy, I chanced it with some freebie film, using the squeegees, sprayers and slightly soapy water I've had for years. I also used a heat gun with great care, to stretch, dry and smooth the film. It took a LOT of time, applying, removing and reapplying. It looks pretty good but not perfect.
For a new gorgeous Vette, I would seriously evaluate reputable professionals to work their artistry.