My second entry, if it doesn’t get built for this GB it probably isn’t going to get built.
Not sure about the kit colourscheme afaik the 747 should be bare metal. But it will otherwise be OOB notwithstanding any correction required.
Mystery solved the first 747 was acquired from American Airlines and had the tail painted in nasa colours but retained the AA livery elsewhere. It was subsequently repainted ( and refitted ?) in full NASA colours. Not sure where the second one came from but it was fully repainted before being put into use by NASA.