I paid $800 for the paint repair and OptiCoat Pro install, this included Glassparency on the roof and all other pieces of glass, and some product described as ScotchGuard on steroids for the leather and fabric interior (that last bit was free because I got a referral).
After drying overnight the 3M spray film has dried and is now transparent:
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From the front, it's almost impossible to tell it's there
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Looking at the treated bumper next to the untreated hood you CAN tell a difference, but not bad considering this will help with bugs and rock chips.
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It's obvious at the suns reflection that there is a film on the car, but for a $9 can I am extremely happy. Now to test drive it and see what the sensors think of the coating. If it doesn't work I can always remove it from the sensors with a toothpick.
-Randy