AAR 40' box cars?

[NW Modeling List]

I returned from a train show today with a generous handful of AAR steel 
40' box cars - mostly Athearn, but a few others as well.  I'm not 
impressed with the paint or details, so a little work is in order.  As 
such, I have an opportunity to repaint and re-letter the cars.

Did the N&W have any such cars in 1940?  If so, what did they look like? 
  What road numbers?  Are there HO scale decals available for them?
-- 
Kenneth Rickman - krickman1 at carolina.rr.com
Salisbury, NC