We recommend maintaining the protection on your headlights at least twice a year and possibly more if you live in the southwest or your vehicle sits outside all of the time. A typical carnauba wax can add a few months of protection to your headlights but a synthetic paint sealants can double that. Ceramic coatings and Graphene coatings can increase that longevity by years and may be a good long term option for protecting your head lamps. Overall, this process can take as little as 20 minutes and as long as an hour depending on how badly damaged your headlights are. This is one of those tasks that we cannot emphasize enough on taking your time as your life is worth properly working headlight.