What type of wood should be avoided for body repairs in vehicles over 25 years old?

When repairing the body of vehicles that are over 25 years old, partially rotted wood should be avoided because it compromises the integrity and safety of the repair. Partially rotted wood can be weak and unstable, making it unsuitable for vehicle repairs where solid and reliable support is essential. Using rotted wood may lead to further deterioration, affecting the overall durability of the repair and potentially compromising the vehicle's structure and safety on the road.

In contrast, pressure-treated wood is designed to resist moisture and decay, making it a more viable option in many situations, while newly constructed wood and plywood can provide solid, stable materials when properly treated and used in the right contexts. Thus, while new and properly treated materials can generally be useful, incorporating wood that has begun to rot offers no long-term benefit and can lead to further issues in the vehicle’s repair work.