ALCOA covered hoppers?

Somewhere years ago I acquired decals for HO ALCOA covered hopper -
has the ALCOA logo with large black block lettering ALCOA for side of car - anyone have details as to exactly what type car they had? Apparently they were leased from SHPX / Shippers Car Line Corp. but I want to ensure if possible that I can apply decal to a PS-2 covered hopper (Roundhouse) in good conscience ! Anyone know or maybe have photo?
James E. Bradley Hawk Mountain Chapter NRHS

jebradley wrote:Somewhere years ago I acquired decals for HO ALCOA covered hopper -
has the ALCOA logo with large black block lettering ALCOA for side of car - anyone have details as to exactly what type car they had? Apparently they were leased from SHPX / Shippers Car Line Corp. but I want to ensure if possible that I can apply decal to a PS-2 covered hopper (Roundhouse) in good conscience ! Anyone know or maybe have photo?
James E. Bradley Hawk Mountain Chapter NRHS

Go to this link for a pic of an ALCOA car.
http://www.blwnscale.com/BLW%20Special%20Run.htm