You may want to consider this …..
Applying Paint Protection Film (PPF) onto a car that already has ceramic coating is generally not recommended because ceramic coating creates a slick, water-repellent surface that can interfere with the adhesive on the PPF. This can lead to poor adhesion, causing the PPF to lift or bubble over time.
The best practice is to apply PPF first, then apply ceramic coating on top. Ceramic coating over PPF enhances protection, adds gloss, and provides hydrophobic properties while allowing the PPF to adhere properly.
If a car already has ceramic coating and you want PPF, the ceramic coating usually needs to be fully polished off before applying PPF to ensure good adhesion. Some sources also mention that modern PPF adhesives can sometimes bond well over ceramic coatings, but this is less reliable and not generally recommended by professionals.
In summary:
• PPF after ceramic coating: Usually problematic due to adhesion issues.
• Ceramic coating after PPF: Recommended and common practice.
• If PPF is needed after ceramic coating, polishing off the ceramic layer first is advised.
So, you should avoid applying PPF directly onto a ceramic-coated car without preparation, and ideally apply ceramic coating only after the PPF has been installed.