PPF 拆膜 & 換膜完整指南 2026：幾年換一次、拆膜傷唔傷漆、費用逐項計

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PPF 一般 5–8 年換一次。拆膜正確流程唔會傷漆，錯誤方法會扯甩 clear coat。附 4 個換膜警號、3 種拆膜工藝、以及 2026 香港拆膜 + 補漆 + 重貼費用表。