Many Cars had Prisim Glass (depending on era) with etched lines. Walthers many moons ago had a decal sheet in HO for these, I purchased one and cut it down in size and used it on two Rivarossi Pullmans. Then decided it was too much work to do more cars. I also used thined Testors White Paint to do the frosted windows on several Rivarossi cars like the window between the kitchen and dinniing area on the Santa Fe Cafe Lounge car. Thhis looked ok. Nate Goodman (Nato). Salt Lake, Utah.