Split these posts since we had not only gotten off thread (moving from valance to trunk painting) but also moving from Mustang and Shelby shared details to Shelby only
It will be moved to the Shelby section is a day or so also to keep things organized
Although a bit off topic to valance, this does involve trunk.
I assume the trunk lid on a knockdown headed for SA would not have a trunk lid or exterior body end caps installed at all when it got painted.
I'll also assume that a previous line worker would have installed the trunk hinges, as if this were a normal Mustang.
So the hinges would have paint on both sides of where they bolt to a trunk lid and the body sections where end caps normally would already be installed (loosely, with a gap) would be fully painted?
The term "knock down" was not a term Ford used for Shelbys but something IMHO penned in a magazine in the early 90's then repeated over and over in some articles related to the cars since then. A uneducated decoding of some markings found on a car in the original artilce I believe lead to this urban myth .... juts a pet peeve of mine
As far as an exposed hinge on a Mustang that had been marked for delivery to Shelby often didn't get a good coat of paint on the ends of each hinge. We see this practice again on 69 s that became Shelby's
Example Some were sprayed a little light while others had a decent paint job from at least the side that would be visible
Same car - Drivers side got a light or cut short application of body color while the passenger side got a decent full coat
Here is another example (might be same painter) where he did take the time to paint the tip of the hinge. Shows a light coating of red oxide primer on the surface
Also note the extra rubber trunk lid spring insulator that was typically placed at the end of the spring to keep it from falling/jumping out that was in place when the car was painted
Last example shows a passenger side hinge that got a full coat of paint front and back