Let's see if I can be of some assistance, or I may add some more confusion. I have a nice picture from Gene Hetlands (RIP) collection in 2008. It shows his original low milage DL Roadster with original body paint. The top was also believed to be the genuine, but bleached after 76 years.
You also see part of his Cabriolet with a new top, which could be a pretty late version of T-14 in the 2000's. Le Baron Bonney had the T-14 material produced several times and the color shade became lighter and lighter and more gray each time in my view. It never returned to their first "more genuine looking" green shade. I don't say that the first version was a perfect match to the original in 1932 (who knows that?). However, their first versions bleached very easily and turned into light tan to white in one summer outings. I have no reference to the sun resistance of the later versions. Probably better.
