1. Place any vehicle in editor and name it myVehicle.
2. Place the module "set vehicle part damage", select any part, set the damage to 1 and synchronize it to your placed vehicle.
3. Place a repair truck next to it.
4. Preview
5. Look up "damage myVehicle", it'll be zero.
6. Go into myVehicle as driver, the part you've selected in module will be red and totally damaged.
7. Drive the repair truck to myVehicle.
You won't be able to repair it.