I find chalk weathering to be so simple and easy that I don't understand why all Model Railroaders don't weather. The plain truth of the matter is (at least where I observe real railroads) the rolling stock I see out on high iron and in the yards all has weathering to some extent and there are very few new or freshly painted cars sighted. Being able to easily wash off a weathering job you are dissatisfied with, makes using chalks FOOL-PROOF!
NP 2626 "Northern Pacific, really terrific"
Northern Pacific Railway Historical Association: http://www.nprha.org/
I agree..I am experimenting with chalks since I am finally getting around to lightly weathering my cars.
I'm far from being a "expert" on weathering but,I have learn there are different weathering eras and one should study the weathering of the era he/she models.
As examples..
The steam era everything seem to have a light overspray of weathered black.
The cleanest cars seem to be in the 70s since the railroads was in the process of replacing the "steam era" freight cars with modern cars..
Larry
Conductor.
Summerset Ry.
"Stay Alert, Don't get hurt Safety First!"