The best way to remove wax, polish or tar from the surfaces of an automobile is by using a clay bar. this is essentially a block of clay which can be folded into different shapes (e.g., square, rectangle) before it's applied to the surface of an outdoors item like a car. once it's in position on top of the car's painted surfaces, lightly slide it back and forth or side-to-side for about 20 seconds; then pull it towards yourself – this should loosen any residue (including wax, polish and tar). the resulting removal will leave behind much smoother surfaces both inside and outside your vehicle because without all that wax, there are no obstacles preventing water vapor molecules from escaping past the paint jobs
