香港夏天 PPF 保養完整攻略 2026：暴曬 / 暴雨 / 鳥糞 / 樹脂 4 大威脅

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香港 5–9 月暴曬（40°C 車面）、暴雨、鳥糞、樹脂係 PPF 4 大殺手。附每月保養時程表、8 個實用清潔技巧、以及夏天洗車 5 大禁忌。