I will add my .02 here. I have done this several times with several cars over the years. Check your local laws re: just how dark you can go. Our local police carry an acrylic bar with different grades/percentages and if it is too dark, you get a fix it ticket (which can be expensive - especially if you have it redone in a lighter shade. I do like adding tint for aestetics but personally like a mid grade. I have also had some bad experiences with very dark tints at night as well as different materials reflecting differently. Good luck.