I know there are "purists" on this board, but in a case like yours, I would think that the reason you have mentioned should be enough for any normal person. I had to change out my dash frame on my '68 GTX...reason?...'cause the other one had been hacked up by the radio. I could have probably fixed it because it's hidden, but the replacement frame was so clean that I couldn't resist painting it up and using it. I didn't "document" anything....Whoever ends up buying it after me will just have to believe my story as to why the Rosette rivets have been changed.
OK...now I'm ready for the verbal abuse...!!! LOL