Body work repairs.
Smart repairs ( Small / Medium Area Repair Techniques) are smart because they save the customer money. Unfortunately not all body work damage lends itself to repair by this method. Why have whole body panels repaired for a small scratch or scuff, or have a bumper replaced for a small hole or split? By repairing only the damaged area, and not respraying whole body panels, smart repair is the ideal solution for minor damage to bumpers and wings etc. which don't require replacement.
At some point, most cars pick up minor damage. It's pretty much unavoidable. Dents and chips in paintwork can significantly decrease the value of a car in themselves, but worst of all, any kind of break in the paintwork will eventually lead to rust. The prevention of corrosion is in it's self a good enough reason to have damage of this sort seen too.
Look in any used car price guide, and you will see that the price difference between a car in poor condition and one in top condition can run into several thousands of pounds. Minor damage is well worth fixing if it can be done in a cost effective way.