Does the Sheriff's Cruiser only have a Primary Paint or does it have a Secondary Paint too? If so, could you make one that is Black & White and post photo's of it on here? Question: If you get the GTA V App, will it change the Plates on Emergency Vehicles you can't customize too? I hate having to have the app just to change the characters on your license plate.
I'll test the Sheriff's cruiser out and post the results here. I think it may only have a primary color however.
As for the app, it will only change the plates of your personal vehicle, gta online vehicle, or whatever vehicle your character was last in. (so long as it isnt an emergency services vehicle) it's a weird system.
ETA: Tried to make the cruiser black and white. This was the result. As suspected, it's only got one color. (The wheels also changed but that is beyond my control)
Looks good. Have you tried matte black (or any matte colour) to hide the decals/signs on the sides?
No but I will try that.
ETA: Didn't get a pic but sadly the logo is still visible, as the blue part that the logo is on is permanent and cannot be changed.