Another recent purchase here. This is a very light weathering just to take away the plastic look and to make it look a bit more 3D.
I have used no Roof Dirt, Frame Dirt or Brake Dust, my usual go to colours. I have used a dilute Humbrol Black only and done what I call shadowing, just putting a little dirt/shadow in the door crevices etc and a dab and wipe on the buffer beam equipment.
This hopefully gives the impression of a well kept ‘pet’ loco.