The last new car I bought had a crapload of tire black splattered on the wheels and surrounding wheel wells. A lot of sand had accumulated by the time I got home, but the tires still looked black. 
Make sure your tires still have those little things sticking off them after they come off the production line. 
Sounds like you have it covered though.
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2010 1SS RS, LS3, SIM/Black, painted rally stripes, AAC sidemarkers, Sunroof, B.A. sound sys; 20x9.5 & 20x11 SV1-C5's; MGW short shifter; Hotchkis Track Pack; Corsa catback; Kooks 1 7/8"; ADM Street; Magnacharger TVS2300 - 548rwhp/512rwtq
1100- 2/18/09; 3800- 6/15/09 VIN#18308; Delivered 6/29/09!!!!!
2014 CTS-V Sedan, Black/Black, Auto, Recaros, Ultra-view, Red Brembos. Stock
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