Oh, real scrappy! What I wouldn't give to let my
IG fight your traitorous scum

Looks real good, colour scheme and wear and tear looks just as it should.
If you could give us some more close-ups of the commander however? Considering the sculpting job you did on the Nurgle walker, I'd think you'd be up to the task of giving the commander some... heh... "gifts" from Daddy Nurgle. Leading and gathering troops against the "false" god you'd think he'd sort of become more like a Nurgle Champion than a simple renegade Imperial Commander. Or not, if that doesn't fit your fluff. Just a thought

A boil here or there, a sagging eye or some puss-spewing thingie. I see from here that the close combat weapon arm looks like it sports some sort of deformity. Can we get to look closer at that?