Dirty car repairs are mainly due to dirty cars. When repairing some objects exposed to the air, you will encounter dust. When repairing the engine and other oily parts, it is easy to enter dust, and there is carbon deposit in the engine, which is black and dirty. Repairing a car can actually be done without getting dirty. As long as you pay attention, your hands are dirty and your body is not dirty ... of course, this is the car's point of view. Because many things have to be repaired under the car, the big car is so dirty.