Auto detailing is the practice of performing an extremely thorough cleaning and polishing of an automobile, both inside and out, to produce a show-quality level of detail. It can be practiced for personal satisfaction, and it is also performed to prepare a car for a Concours d'Elegance (often shortened to just Concours), a car show that features the appearance of cars, often in a beautiful setting such as Pebble Beach or Amelia Island. Some elements of detailing are extra polishing steps, and cleaning of every nook and cranny such as the inside of doors or hard to get to corners in the interior, often by using an old toothbrush.
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