I felt like I needed to wash the car again to get it clean. The car was still covered in small spots that came off simply with a light rub with finger nail when wet, so would have come off easily with a little elbow grease by the washers. The dash had dust still in all the joins where a simple wipe with a damp cloth and some care would have fixed it. They did seem to pay some attention to the wheels though.

Approximate cost: $25