I don’t believe there is any no-maintenace coating. Many detailers recommended to put another layer after a period of time. Otherwise, your coat will wash away.
To ensure longevity and the beautiful glass finish, all ceramic coatings and not just Modesta require maintenance such as the following;
Weekly or bi-weekly wash with a dedicated car wash soap, using two buckets with grit guard inserts
or
Rinseless wash method using micro fiber towels and microfiber wash mitts and Optimum No Rinse(preferred method).
If you are not able to hand the wash the vehicle, I do highly recommend you take it to touchless car washes, with no rotating brushes that actually make contact with the vehicle.
This is very important as MOST COATING WARRANTIES can be voided if you go through brush car washes. Contact your detailer and ask him or her if your coating warranty covers brush car washes.
Regardless of warranty status, All brush car washes CAN AND WILL eventually put swirl marks and scratches into your vehicles clear coat, despite the existence of a ceramic coating. Again, while many ceramic coatings are scratch resistant, they are not scratch PROOF.
All of this being said, ceramic coated vehicles are extremely easy to clean and maintain compared to vehicles that are not coated. With a solid washing process, your vehicle will look better than ever after a simple wash.
Annual recoats; it is recommended that you get a repost depending on the condition of the coating.
For example my Petro Race car, even though it has a PPF and ceramic coating, I still get the annual recoat as I get rubber and road debris from hitting the different tracks, not to mention the off road excursions that frequently happen.