You need to remove the ceramic for proper adhesion.
Easy to do with a polisher and some decent compound.
Test fit the spolier. Use painters tape to mark the edges of the spoiler.
Use a microfiber cutting pad and something like Jescar Correcting Compound or Sonax Cutmax.
Final wipe with IPA...
Thank you very much!
The splitter is very much function over form. Its pretty from far away lol.
I have something new coming I hope will make it look even better.
1 - you dont need the screw
2 - most small (3-5mm) spacers arent hub-centric. As long as you still have enough hub exposed to seat the wheel it should be fine