All my apologies for the late answer and thank you for your kindness.
Your skin in CM, before my own preview
The result with the two last versions of the skin
My own preview with the 2.1 version of your skin, your two last versions gave me the "black issue".
Obviously in the game, the car stills black as shown with the preview.
I wish you a good day.
Could you please join my Discord server? You can find the link in the mod description, I'll help you there, so you'll get immediate help and not in chunks, because I use a lot of Discord and not much RD.