strip is a personal prefrence. I have had them on past cars but will not be able to put on on the 3 due to the dot matrix on the front window plus I don't think it will look right. As for the % of how dark to go if its going on the vette I would say 50%. reason being with a dark colored car with dark int and a small/smaller overall cabin it will look alot darker. When I get home tonight I will post a pic of my truck so you can see what I mean.