Thanks for the heads-up vur.
I just checked out that area on my 2013 GTS (the seal that runs along the front edge of the engine bay between the headlights) and, after folding the seal back, did indeed find one tiny spot of rust on the metal strip that secures the seal to the body.
This really surprises me, as my car was purchased new and has been pampered ever since (only 20,000 ks, garaged overnight, not near salty air, always hand-washed with Auto Glym PH neutral shampoo, etc).
My husband (the family car expert) had a look and declared it only superficial, but then spent ten minutes on it anyway, eliminating the rust with some emery paper and applying a dab of black 'Killrust' paint with a cotton bud.
Congratulations on your eye for detail vur, as I'm sure no body else has spotted it.
I guarantee every 86forums member who reads this, especially those with earlier cars, will be folding back that seal to take a peek .