Hey buddy,
I love my StuG's so am always pleased to see one gracing these pages.
Overall the build looks really good - well made, tidy and generally very, very presentable!
The first thing that came to my mind as it obviously did the other guys was the glossy figure. He needs a layer of dullcoat imo - he's very well painted though and his cammo is great, my figures are that bad I don't even use them so top work!
I think I can see what Hun Hunter is saying re the tool scale? I must admit they don't look quite right but I'm sure they're fine Photo angles perhaps?
Overall, I'd say this build isn't finished. It's a bit too tidy and some streaking effects and some extra pigment work will really help. With the pigments look at the build and think where would dust and muck build up on this StuG in real life? Try some additional drybrushing maybe and get a hint of rust on certain areas like the spare track run up front.
I've found a very good and simple method of weathering - it's no secret method at all but now I've tried it I'm hooked. It's basically a take on an Acrylic wash. I put a very small amount of my chosen paint into my airbrush cup and fill the rest of the cup with water - probably 2 parts paint to 8 parts water - and spray a fine coat into recesses and onto raised areas and corners. Buff works well as it gives a nice dusty appearance or replicated an area where wet mud had once sat. Play around with it but trust me, it works really well! It wil look odd at first but as soon as the water has evaporated it looks superb.
Also, look at the wheels - very uniform and neat. Put the vehicle on it's side and add a darker wash into each hub and let dry then do the other side. Mix some lighter shade pigment with a bit of water and apply to the tyre walls - when dry rub off ensuring a residue is left behind. The effect works well.
I'm no veteran modeller, I've only been building for just over two years but these are just a few things that I've found make a good build really go 'pop'!
Bill Plunk (wbill on here) has a great website called 'bpmodels' and there is a link to it at the bottom of his posts. He blogs every one of his builds very thoroughly on there and uses some great weathering techniques so check his site out asap!
ATVB
Ben