My Z1 front slotted rotors do the same thing. It's really not a big deal. Paint them if it bothers you. I've painted them in the past, now I just deal with it.
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Stillen G3/Z1 HFC's/Invidia Gemini/UpRev tuned by Jotech 315whp/Stance XR1 coilovers/Kinetix/SPC camber-toe/Z1 SS brake lines/Z1 Slotted Rotors/20"Work CR2P/Michelin Pilot Sport 4S/GTR Start/GTR Map Lenses/JDM Fog/Amsoil/Redline
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