Aren't those strips meant to peel off when they get messed up?
Seems like there are several options:
New clear protection strip.
New colored vinyl car wrap in that area, perhaps a contrasting color or chrome etc to match your wheels or brake calipers.
New aero kit rocker panels and forget the protection stuff.
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"It broke because it wants to be Upgraded
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2012 Porsche Performance Driving School - SanDiego region
2001 Boxster S, Top Speed muffler, (Fred's) Mini Morimotto Projectors, Tarret UDP,
Short Shifter, Touch Screen Dual Din Radio, 03 4 Bow glass Top (DD & Auto-X since May 17,2012)