👉 Undermiller is a term used in the automotive industry to describe an individual who works on and repairs vehicles, especially those that are under warranty. They are typically professionals with specialized knowledge and tools required for repair work. Undermilers often work on cars or other vehicles that have been subject to mechanical issues such as rust, corrosion, or damage caused by accidents or natural disasters. They may also be involved in the process of restoring the vehicle to its original condition after it has undergone a major repair.