First welcome to the site.
I've been doing a lot of research on the rear grey treatment for my car. I saw a few people looking for the exact shade of Dark Grey Poly.
I found the exact dark grey poly color on carpaintonline.com. ......
As asked in another post - have you purchased, shot this product and compared it to original paint? Since you report its an "exact" shade - I'm guessing that you have, would love to see a picture of the two surfaces.
I have a dusk rose mustang that had the two tone S5 code option, which included a grey rear paint treatment based on the Marti report. ..... I'm trying to find a definite answer as to how much of the back panel is the dark grey poly. I know it goes up to the top lip of the panel but how far across that lip does it go? Also, is the back of the panel painted pink or grey. I've been all over the internet and discovered only 13 of the 67's had this option. ......
A search of the internet turned up 13 cars or did your Marti report? Seems kind of low (even though it was a very unpopular option) given the number I've got in my records.
Guessing your car also had the exterior decor package.
Where was it built since the paint details may differ from plant to plant like they did on the 70 Boss 302's for example?
I suppose that you already did a search of the site and saw the picture posted in 2009 of the taillight panel paint details
Search is your friend
Of course it doesn't show the paint details of the end caps and trunk lid but we can cover that as the discussion progresses