Nearly seventy-five Colorado winters rusting away at the structure did not breed confidence.
Once you have removed the rust, paint the surface as a way to protect the grill from future rusting.
The battery chargers for the electric locos also used in the mine were rusting away quietly.
On cars without plastic sill protectors, look for rusting at the rear bottom edge of the front wheelarches.
The Factory - Another fairly small level, again a metal theme, with lots of rusting machinery around which sets the style nicely.