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Sacrificial Protection
sac•ri•fi•cial [:designed to be used up or destroyed]
Wax coatings act as a sacrificial buffer between a paint surface and the elements; these coatings are gradually used up (hence sacrificial) and reach a point where they can no longer protect; when they reach this point they must be renewed.
What provides the best protection against environmental damage to paint, which comes in a varied range of threats; acid rain, road salt, tree sap, hydrazine an extremely active acid that is found in jet fuel, industrial fallout, ultra violet radiation (UV-A and B) and other airborne contaminants are very detrimental to a vehicles paint film surface.
They are all forms of environmental contamination and given the right catalyst; reactivity (heat) plus moisture, they will become acidic. During this process the metal absorbs oxygen from the water and forms iron oxide (rust). Given the porosity of paint they permeate the paint matrix down to body metal.
The latest nanotechnology coating or PPG CeramiClear™ Clear Coat although they are highly resistant to chemicals, detergents, scratches and ultra violet radiation (UV) will only offer limited resistance to acid etching from environmental contaminates. A product like Collinite 845 Insulator Wax is probably the most durable inorganic wax product, and but this will only provide enough of a barrier to enable it to be removed quickly before causing too much (etching) damage to the paint film surface.
No wax, polymer sealant or nanotechnology coating on its own, can provide a permanent shield against acidic attack from bird excrement, acid rain etc as they are all incompatible with strong acids.
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