I'm always happy to help out with stuff like this, especially when it ends in something like this.
Great job, mate, can't wait to try it out.
The only thing I noticed is that the gun barrels for the cowling MGs are the same colour as the cowling.
Perhaps the area around the muzzle for the MGs would have a small amount of blast residue too, even though I have read that they were supposed to be cleaned regularly.
Perhaps a little bit of scorched paint from the muzzle-flash?
Also, one final thing, the colours seem to behaving strangely on the MG 151/20 access hatches on the wings.
That's getting pretty bloody picky, though, isn't it?
Also, one final thing, the colours seem to behaving strangely on the MG 151/20 access hatches on the wings.
Fantastic job, mate. Like I said, can't wait to try it out.

[edit]
I also noticed something else, did you put the leather pilot's suit on the pilot?
Like this:

If so.... kudos for the attention to detail.
I've never noticed the 190 pilot before, so maybe that's just the default. Hahah.