Here is the owners perspective on the flairs.
"I’m assuming that they are talking about the Fender Flairs. If that is the case, with experience, we have learned that if you reinstall flares on top of the film on the fender, the constant movement and bounce will rub that area and the film will start to pucker because the flares are so tight. Imagine those two surfaces rubbing together with film there. This happens at times where hood scoops are tight such as on a Charger Hellcat. Some may want the hood scoop removed and the film tucked under it. That scoop is tight so the film will picker at those points. We install 1/16 of an inch from the flair so that doesn’t happen. We wrap the flare separately and wrap all the under the wheel well when possible.
Attached is an example."
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