That is what I have found in the wrecking yard, no paint on those clips.
It could make sense to have the clip added later. Maybe during the installation of the trunk light, jacking sticker, fuel tank and peripherals, trunk mats, etc?
I do not find paint on the rubber spirals, which seem to be found on all 1967 Cougars, and very early 1968 SJ's. Didn't find an early Dearborn.