When driving your vehicle (or even when it’s parked outside!) your paintwork is exposed to all manner of contaminants from the outside world. Brake dust, tree sap, bird mess, metal dust and more can all become bonded with the clearcoat on your paint.
The clearcoat surface isn’t 100% smooth – rather, it has micro-indentations on it, both from application and from exposure to the outside world, which can easily trap and embed foreign particles, which can combine in larger quantities over time, to dull the appearance of the paint, and potentially cause scratching and swirling.
Using wax on a vehicle without using a clay bar can “seal” these contaminants under a layer of protectant – that’s why we recommend a clay bar as a precursor to wax treatments, for the best possible final results.