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When I had a ceramic coat professionally applied to my cars, it came with a warranty. The warranty was voided if I went to any car wash. Hand wash only. Restrictions may have changed based on new ceramic developments as that was 6 years ago, but that was a tough warranty period (3 years with annual application) to get through- especially since I didn’t know to ask about that before I had the work done.
That said, it looked awesome!
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