Let me say it again: If you are modeling an unusual level of weathering, (or an unusual variant, or anything off beat that you found somewhere) bring documentation. None of us judging has seen every variant in every level of weathering and, believe it or not, we try to be fair, honest and just. You found the reference, you're here so you have a computer, and, most likely a printer. SHow the judges how you repicated a real world vehicle. AMPS strongly encourages that and most other shows accept that as well.
Last Saturday, I judged a bizarre RSO conversion of a manned Weermacht snowblower. It was mostly scratchbuilt and had diocumentiong photographs. It took best armor and was well in the runing for Best of Show, except for a superbly detailed Blackhawk. Without documentation, we might have thought it a fanciful imaginary vehicle and it might not have done as well as it did.
At the same show, I had to explain to Wolf-Leader that his very well done "The Beast" tank fell short due to the monochromatic scheme, including tracks, which he replicated from the movie. Had there been a reference photo, things might have gone differently.