Weathering a CN N scale boxcar

[Herc Driver]

Here's a little better picture. Again, the car on the right is untouched and the car on the left is weathered with a mixture of yellow and white chalk. The slight rust on the trucks is from a rust colored chalk (I found out later you really shouldn't use chalk on the trucks so the wheels don't foul and increase friction). To my eye...the yellow seems to cut the deepness of the colors down more effectively than white alone. So I use a very slight dusting of yellow first, then go over it with white. Adding a yellow dusting to blue, black, boxcar red, or red cars seems to lighten them up really well.