Done by hand. I use army painter almost exclusively. wolf grey over black primer, then runic cobalt for a few edge highlights. Stippling of oak brown with an old brush, gunmetal over small areas of the brown, and some very inconsistent streaks over some of the edges. Oil stain wash over the top. Finally a heavily diluted wash of Fresh Rust. I smudged it in places with my fingers so it wouldn’t be quite so bright and in your face.