The stain on the bugs looks great, tho with the overall neutral color I would suggest something other then red as the contrasting color. Maybe something a little less obvious since they are tryin to blend in with the urban area. Possibly a darker gray color would work.
The MIs look good as well, but some of the stained areas are a little heavy. A light drybrush of the original color would tidy them up while keeping the dirty look.
That blister is cool. 8)
Nailing down the color scheme can be a headache, looks like you got a good thing goin, keep up the good work!
