To protect your car we need to keep it out of the sun and prevent oxygen from coming in contact with the paint. Easier said than done.
It took energy to create the beautiful machine that you drive lots of. But with too much sun, your car could get damaged. Sun energy in the form of heat and solar radiation, will return your vehicle to the materials it originally came from. The oxide of most materials is more stable than its pure form, just as objects fall to states of lower energy so does everything else seek states of lower energies.
Plastics, metals, paints and fabrics will seeks lower states of energy in the presence of energy and oxygen. Driving your machine on a sunny day is half the fun, but where possible find shade.
The only option we have is to prevent oxygen from coming in contact with the vehicle. We do this by covering our vehicles with wax. Wax forms an inert barrier that keeps the oxygen at bay. This wax wears away with time and it need to be replenished.
Wax or polish?
There’s a lot of talk about wax or polish what’s better etc. There is also a lot of marketing hype that confuses the issues and misinforms people. Basically, a wax is a synthetic or naturally occurring substance that adheres to a surface, forming a barrier between the substrate and the environment. Stay with me it’ll make sense in the end.
A polish is a substance that contains a wax for protection but it also contains mild abrasives, solvents and other cleaning compounds. If your car is 100% free of foreign matter on its surfaces, by all means use a 100% protective wax. Most general punters working on their car on the weekend are better served by a good polish; as you don’t want to seal in the dirt under the wax.