new porsche
 

Just got new 911 and noticed fine line running across roof, I brought it to detailing place and got it back. Looked like fine line was gone but then in light I saw it again?

Any clues as to what to do?

Take it back? Sounds like they just need to use a different cutting compound. If they are through the clear coat, there won't be much they can do and that may be as good as it gets.