I agree with you on the Performance CF Spoiler install. The center section from the rear was a real pain to clean up (especially since I was working around the tape used to secure the spoiler) and there is still a tiny bit of Betalink visible if you look closely. So to all of you DIYers out there, use Betalink sparingly!
I have had the spoiler on for roughly a month now and I have to say that it is holding up great. Solid as a rock. I do not take my car through automatic car washes so I cannot comment on how it holds up in there (I have always wondered but auto washes are a big no-no for me)
OP: you have a great "first round" of mods on your car. Enjoy and thanks for your comments!