I have tried the night shades tint,works great on plastic.Not so good on glass,on glass once it gets hot it starts to run off the glass and sag at the bottom.I did my 04 mazda 3 with night shades all the way around,taillights side markers headlights real light.At night plenty of light during the day looks blacked out.I did this on my wifes typhoon looked awesome till i drove along distance had the headlights on.Got to where i was going and headlghts were messed up.So plastic sticks fine no heat issue glass not so good.
I have a buddy that works at a body shop who is doing my headlights now for gn.He is using automotive clear and just adding black base till color is smoked but not to tinted.He has done this on a few cars and heat has not been a factory after.He also redid the typhoon but i don't have pics of it,and i don't have the Typhoon to take pics of it anymore. As far as lwa and cops ther is some hoops but most cops don't know them.They have to project light from so many feet when on etc.By using the clear or nightshade stuff they do but if to dark they wonty,due to layers are so thick.I have my mazda tinted for 3 years now never been pulled over for tinted anything ,and gn has headlight covers and marker covers no problem either .
here a pic of mazda tinted out..for referenceif look at side marker on fender that was a clear lense,and tails bummper lower and side had red i went dark on them.Headlights just enough to take chrome look away.Which i am going to pull off and go a lil darker yet...