Found these two photos on a EBT website (http://mentilucent.net/EBT/EBT.html)
Looks like someone got about half-way through weathering and quit :)
(https://www.finescalerr.com/smf/proxy.php?request=http%3A%2F%2Fi856.photobucket.com%2Falbums%2Fab130%2FLCRRinHO%2FVehicles%2FEBT41.jpg&hash=1a87c050c4757ccb7d2534a375867f721e6396ba)
(https://www.finescalerr.com/smf/proxy.php?request=http%3A%2F%2Fi856.photobucket.com%2Falbums%2Fab130%2FLCRRinHO%2FVehicles%2FEBT49.jpg&hash=a4544462be06c04b6aa75ccb1c66b289f7917485)
Interesting on how it rusted ? if you did a model and weathered it like this......someone would chime in and probably say you did to much paint chipping ;) Craig