Looks like they might just be dipped in the film.
The carbon doesn't go into the lug nut holes.
__________________
1969 Camaro LS2/T56 D1SC www.automotivedesigneng.com
Special thanks to: DPE Wheel / Columbia Parts Company / US Collision / T. Bruning
Marty Thanks for letting the cat out of the bag!
Special thanks to Frank @ Prodigy hooking me up with these VR3P Wheels from Forgeline and Tom Argue did his magic to tie in "Evade"s Them! Soon to be mounted!