I have used ZAINO on all my BMW's. It is simply the best car wash and polishing products available. I was skeptical at first but I have used their car wash for 6 years, All in one polish, Z-5 polish with hardener, clear seal, and finishing sprays for in between washes, tire shine, and glass polish (amazing how it cleans water stained glass with just hand polishing), leather cleaner makes your car smell showroom new!. If you used nothing but their car wash you would be happy. My wife just got a new X5 M50i a week ago and when the weather gets warmer in a week I will apply the AIO polish no additional wax needed.
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