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No need to. I'm an authorized installer of several coatings and have been since 2010 and have done plenty of my own testing. Try Googling it...
As I said, they all excel in their own way, just like waxes and sealants.
Not sure why OC would cause finger prints to show anymore than a none coated car??? Have you tried parking next to another uncoated car of the same color and touched them both at the same time? Just doesn't make any sense as I've never seen anyone mention this before...
As far as spotting...