How long the restorer will last once applied greatly depends on the chemical makeup of the product. Some last a few weeks, while others last anywhere from 100-200 car washes, and some even last for years. Check labels and user reviews to get an idea of longevity with any restorer you’re considering purchasing. The products on this list need to be reapplied between a few weeks to a few months, but if your car is regularly subject to harsh sunlight or dusty tracks, you’ll likely need to apply the treatment more often. It’s a good idea to make a note in your calendar when you first apply the coating, so you can see exactly how long the effects last for your vehicle and driving conditions. With this information, it’s easy to incorporate the restorer into your regular car cleaning routine.