I'm perfectly comfortable using the panzergrau color scheme on the German vehicles; however, I still need to utilize custom vehicle skins on at least the StuG because of the MG modification (gunner's compartment).
I did notice in the Achtung Panzer article that panzers in use in Southern Russia started receiving dunkelgelb (Afrikacorps) coloration during the Spring of '42. That doesn't mean that all panzers had that scheme applied right away.
Anyway, time and patience permitting I would like to apply the unit markings on to the tanks and assault guns for the GD Assault Battalion and 24th Panzer Division, both of which were involved in the fighting at Voronezh.