The StuG should end up looking something like this Rubicon Panzer IV Ausf F. This was the first in my intended group of early 1943-era German armour. It's something of a test model, and it's been repainted at least once (I'm in the process of repairing damage caused by rectifying a dumb assembly error). There is another Panzer IV under construction.
While I really admire the results that people get with airbrushes and pigments (including some of the models displayed in this gallery), I don't use either, so my models tend to look a bit more 'old school'. The Dunkelgrau was mixed using Citadel paints to match a paint chip; it's distinctly more greenish than many pre-mixed versions. Having struggled to replicate it consistently, I think I should have just gone with Vallejo and made life easier. All of the vehicles I'm doing will end up with different patterns of Dunkelgelb camo over the grey, as was reasonably common during the switchover to overall Dunkelgelb during the first half of 1943.
Below the Panzer IV is part of the intended opposition - a Warlord "Uralmash" turret T-34 (although I realise this site should really be limited to Rubicon models). Warlord's mid-war T-34 isn't bad, but it lacks the distinctive all-steel roadwheels which were common at that time (its roadwheels were more common on later variants). Overall, I think the Rubicon version is better. However, I rather like the cast turret - I added more texture, as the real thing was very roughly cast.