hey, im not a tank man, (but after seeing that challenger in TMMI i wanna start. anyone here see that?? F@#KING AWESOME sums it up :))
sounds like u need to add some weathering (dry brushing and washes)and maybe pick out some details. how about adding something like tow cables or spare tracks on the hull? or maybe u could damage/deform some parts that look like they would be the first to go in real life....
i think in taht same issue with the challenger they had a write up of a t55(i think) in that the authour dusted the tank with mig weathering chalks (i think), then sprayed a light misting of thinners(he didnt say which kind) which then dissolved the chalks and let it run into all the crevices, leaving this coat of filth on the tank