Whew! I now have all the stones painted, and did a little bit of additional shading on the wheel. Ended-up using 4 shades of gray on the stones, and "aged concrete" for the headers above and below the doors and windows. On the wheel, I dry brushed on some black around the joints for some aging. Still need to ponder some more on how best to represent the rivets. Below pictures show the current status.
Next step is to pop the mill apart and work the internal components (LED lights, loading dock, wheel motor & mount, etc.) as noted above. I think I'm going to hold-off on doing the mortar lines or further weathering until I get all the internals done and the mill put back together. Getting closer to done!
