There are so few cars of any given model in the game that I think players SHOUL OOCly "look" to be able to scan anything other than model.
Pink Holden would be an instant giveaway as to whose car went by, realistically (speaking of the realities of gameplay, not of in-game realism).
Also: DynaFiber dyeing is not available, though "help tailoring" does make clear that it was planned at one point. I'm following this tangent to save players a lot of frustration when they get the idea to try to look for this option, which does not exist ICly no matter what Help Tailoring says. If it does become available and I'm still playing, I'll remember to bum this topic and state so.
Back to the cars: If "ambient traffic" spammed all kinds of cars in all the colors which player cars came in at us, obfuscating that player's Pink Holden among noise, including OTHER "virtual" pink Holdens, that might make the situation different.
My 2c, for what it's worth.