I didn't use this for any exterior cleaning but I used it on the front of my instrument panels. The previous owner of my little Sheldon Cooper scratched up the plastic which always bugged me because of how often I look at my instrument panel!  I was thrilled when I tried this on the plastic and 90% of all scratches disappeared and the plastic became so much more clear.  I'm going to start using this on my headlights just as a preventative measure since it worked so well on the inside.