Probably right about Black not being as robust as Silver.
Just dug out the paperwork ready for part ex on Saturday and found the original invoice. 'A' Glaze is what was applied to my car, probably it ...
I had it applied at new on Silver Range Rover Vogue 3 1/2 years ago. It gets trades against a new one on Saturday and in the process of evaluating my current car for the px the dealer actually comment ...