I had a clear bra on my F25 that kept bubbling up. I just had Bau, at BMW of Dallas, spray on the new nano spray that is used on some high-end cars out of the factory(and, apparently, Nissan will start soon). It goes on clear and protects against scratches(self heals in the sun) and bugs, rocks, etc....just hose it off. 3 weeks in and absolutely no regrets!
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