You donít apply lotion without taking a shower first, so why would you apply a ceramic before polishing? Prepping your car with P4 Polish ensures that your wax, sealant, or ceramic coating makes contact with a totally bare surface, maximizing coating adhesion and durability. It is vital that a paint correction is performed prior to application of a hand-applied ceramic coating as a ceramic coating will ìlock-inî these clear coat imperfections, making them very difficult to fix. Achieve a mirror-like gloss and deep reflections in minimal time with Chemical Guys P4 Precision Paint Perfection Polish!