Oil, Lube, Grease,
It prevents high friction metal-on-metal contact.
Cars are insulated by the rubber of the tires, which usually prevents them from being grounded. Additionally, the occupants are unlikely to be in contact with any metal surfaces (although, on cars which had metal levers to open the doors, they could be, if they're touching these).
The paint prevents the metal from coming in direct contact with air and moisture, which are what cause corrosion.
When a hot red metal is immersed in water, a layer of vapor forms around the metal, insulating it from direct contact with the water. This layer of vapor prevents the water from coming into contact with the metal and reaching boiling temperature. As a result, the water does not boil immediately.
The side effect of metal detectors is that it prevents the use of weapons and it also prevents violent crimes. The side effect of metal detectors is that it prevents the use of weapons and it also prevents violent crimes.
The bulb socket makes contact with the base of the bulb, specifically the metal contact at the bottom and the insulator surrounding it. The metal contact connects to the electrical circuit, allowing current to flow to the bulb, while the insulator provides structural support and prevents short circuits.
A hubcap is a cover which prevents damage to the hub or centre of a wheel. Usually found on cars they were originally made of metal, but these days they are made of light weight plastic.
Paper does not burn when in contact with metal because metal is a good conductor of heat. When the heat is applied to the metal, it quickly dissipates and does not get transferred to the paper in sufficient quantity to ignite it. Additionally, the low melting point of paper prevents it from catching fire when in contact with hot metal.
Oil and Vaseline reduce friction by creating a lubricating layer between surfaces, which helps them glide over each other smoothly. This reduces the contact area and prevents direct metal-to-metal contact, thereby minimizing friction and wear.
It prevents the body from rusting.
Iron is the metal that is used to make domestic cars but sport cars or F1 cars might be made of carbonfiber
Rust comes from frequent contact of metal and water/oxygen. Paint prevents those three elements from coming into contact because it is works just like how a laminator works. It covers up the metal like a suit of armor to deflect oxygen and water.