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Have a read of the info of the How Long Does Ceramic Coating Last?, Side by Side Comparison of Protective Car Coatings and Top 10 Mistakes to Avoid While Applying Ceramic Coating.
https://www.bestnetreview.com/best-ceramic-coating-for-cars/
From my personal experience, I found ceramic coating not scratch resistant. It just makes your car glossy, can protect your paint from dirt, nasty waters, UV rays etc. It not lasts too many years. I found 3-4 yrs maximum. Many service providers and sellers demand 5-10 years but I don't think so. Many demand scratch proof or scratch resistant, but not at all. From all the perspective, I found that article best and said the many true things about ceramic coating and the myths also.