Yup, the plastic comes off but the adhesive remains, sometimes so shiny it appears that the plastic is still there. Try using a trim iron. Wipe it on the area and the bulk of adhesive will attach to the iron which you can wipe off on a rag. Then try the acetone for the rest of it. Sometimes I have good luck scraping the adhesive with the side of the trim iron, sometimes I use it like a plow, sometimes I just heat it like I was applying it.