Sounds like a lame fix and it's only short term, but a little Adams In and Out spray makes it look great. I found out by accident while treating the black rubber and trim.
330i ~ BMW Perf. Susp. ~ M3 Front susp ~ BMW Perf Exhaust ~ 3.38 lsd ~ SF71 Alf CSL reps ~ Continental Extreme DWs ~ AA Tune ~ WTB: e93 M3 Fron Sway Bar