Installing M Performance CF Splitters on Coated Car

[Fugly M3]

During my recent cross country road trip I ever so lightly scuffed my passenger splitter, so, I'm planning to go for the M Performance CF Splitters. I'm wondering if they can be installed on a ceramic coated car. My guy that coated it said polishing to bring it down and then installing...I thought that may be overkill. Google search was mixed with no specific reference but with many saying they've had success installing 3M taped spoilers to coated cars and others saying they haven't. Search here had limited results.

Unlike the rear spoiler the drag on these I'd think would only work to push them on the car. Also, I assume BMW's Betalink is far stronger than 3M tape, so would the BMW procedure using Betalink mean they adhere better? Would Betalink adversely react to the coating?

What is the prevailing view?

[Eric S]

polish first to remove the coating, no sense in risking it not sticking