I tend to swap cars ever 3-4 years tops and I don't drive that much so i have relatively minor paint chips on all of my cars. BMW paint seems decently durable compared to other makes i've had in the past. If i knew that my car will be a keeper for a 5+ years then I may consider something like xpel but def. do full coverage.
In the meantime Opticoat works for me because I love how water flies off the car and how it keeps it cleaner longer. For the OP you can't go wrong with either products as long as you know what they were intended for.
Alan
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