Red boxcar colors

[lajry]

If the cars are all the same RR use your boxcar red & weather them different degrees of light & heavy. That can be done easily using powders like Bragdon. If the cars are from different RRs add a few drops of white, black or any other color to change your red slightly.
Check the the Microscale online catalog to see many different RR decals. Champ & Herald King decals are no longer made but can be found on eBay & Yahoo Group buying/selling forums. There are also small decal companies that can be found thru search this forum & other MR forums. You can also look for model RR decal forums in Yahoo Groups.