When you have to judge the Concours Morgans, you do see a significant difference in surface coating. It can range from a thick almost Hammerite texture which is obviously sprayed on, to a matte finish which almost looks like lightly lacquered alloy.
The first job should be to remove the allen headed setscrews, one at a time, and apply your choice of ceramic grease, grease, ACF50 or coppaslip.We all have our preferences.
Then screw back in without overtightening. The applied lubricant will squeeze out under the head of the setscrew and can be wiped away. This will prevent water ingress. This is equally relevant for the CX cars.
My Roadstet has the "Hammerite" look and after 20 years has not budged. I would say that this has been done without removing, because there are what I would describe as casual masking marks evident, although these are quite acceptible.
Because I've seen other cars like this, it's almost as it if was a warranty fix, done either at the factory or dealers. The super matte finish is another matter because excessive attention with anything other than a light wax, will create a polished patch of blotchiness, which is hard to get rid of, Strip and paint is the way to go.
