Not a Gp, But this is my second try at tinting. I also used cheap 20$ tint from canadian tire, thats holding up very good for the last year or so.
My brothers old 1994 Z24 I only did the 2 fronts not really a good picture but thats all i got. Just practice on a piece of glass, Use plenty of water and have patience. I did 2 of these in about an hour, With no bubbles.