With my week-long cold I unfortunately didn't manage to get much miniature painting done at all, but I DID paint up my second batch of combat gauges to match my Into The Dark terrain, with a dirtied-up rusted side and a clean side. Weirdly, on the dirty side where I did the rust pigment I actually went a bit too heavy-handed with the matte varnish and it actually dried white in places (or maybe it reacted with the pigment or something? All I know is that I didn't have this same problem when doing my actual ITD terrain) but it's totally worked fine anyway and just added some extra wear!
I also made the ITD "barricades" look at least somewhat better with the application of some airbrushed silver, a dunk in The Army Painter's "Dark Tone", and some drybrushing.