But none of those products is permanent anything. Once done, you need to apply a wax or ceramic coating to protect it. That will last 3 to 6 months in most conditions, unless you wash your car with dish detergent, which will remove it and start allowing the oxidizing of the paint again.

Car polish is not permanent; its longevity depends on several factors:

Longevity of Car Polish

1. Type of Polish:

   • Abrasive Polishes: These are typically used to remove scratches and imperfections and may last until the surface is re-scratched or the paint is worn down.
   • Non-Abrasive Polishes: These provide a layer of gloss and protection but will wear off over time due to exposure to elements.

2. Environmental Conditions:

   • Exposure to sun, rain, snow, road salt, and other environmental factors can significantly affect how long the polish lasts. UV rays can degrade the polish more quickly.

3. Maintenance:

   • Regular washing and care can help extend the life of the polish. Using a quick detailer or spray wax between full details can also provide additional protection.

4. Application Method:

   • Proper application can enhance durability. Using a dual-action polisher may produce better results compared to hand application.

General Timeline

• Light Polishes/Waxes: Typically last a few weeks to a couple of months.
• Sealants: Usually last longer, often from 3 to 6 months.
• Ceramic Coatings: These can provide protection for a year or more, depending on the product and maintenance.

To keep your car looking its best, it's recommended to reapply polish or wax regularly, depending on the type you use and the conditions in which the vehicle is driven.