My paintwork is guaranteed for three years, so if I were to become happy with the match it'd go back FOC. I'm sure this will be the same.
FYI, once the car was at the garage, I no longer spoke to the insurance and spoke direct to them.
Even now infact, the car is going in to have the passenger door aligned as it's slightly different to the drivers side (a bit higher), the garage dealt with me direct and were great about it.
Writing a car off is all well and good if it's a common car, but it's a ballache for something like this. Even though z4's are ten a penny, I really loved this one so really wanted to keep it.