I have this coating on my EQS and before on my EQA.
shop.servfaces.de
After one year (EQA) it was still in good condition. I only wash my cars by hand. Either at home or in a clean park.
In Germany these products are only sold to professional users (health risks). There are also a lot of semi professional products on the market, that could be used by end users. But they will usually only last several months and could be applied either on dry or wet surface.
If you are thinking of applying a ceramic coating, then do it just after the car arrives from the factory/dealer.

Coat Ultima - HSH-Technology - for commercial customers only
Coat Ultima - HSH-Technology - Permanent paint coating for modern paint systems "Coat Ultima - HSH-Technology -“ is one of servFaces´ most powerful hybrid silicon / polymer hard coatings, designed to provide optimum and...

After one year (EQA) it was still in good condition. I only wash my cars by hand. Either at home or in a clean park.
In Germany these products are only sold to professional users (health risks). There are also a lot of semi professional products on the market, that could be used by end users. But they will usually only last several months and could be applied either on dry or wet surface.
If you are thinking of applying a ceramic coating, then do it just after the car arrives from the factory/dealer.