i had 15 of the cars, including 12 troop cars plus several "converted" express baggage cars and a maintenance of way car. Only one was affected by "zinc growth" disease. After that car was discovered and all the rest examined, I was able to get an Atlas replacement for the one bad car, to include: floor, frame and brake rigging as a kit. Bit of a job getting it all installed correctly but I did it and all is well.
Paul Fischer