I'm having some trouble with coloring a car.

When I color a car on gmod (TDMs cars, and yes, they can be colored) they go invisible for a second and then reappear then repeat.
Is there some way to fix this?

Perhaps you installed an outdated version of the cars. Or the scars just need re-installing. How long has this issue been going?

Actually on my older comp, windows xp, I used to have this problem. I would color something and after looking away from it, it would keep flickering from visible to invisible