Saving 1940's Lionel Scale Tank Cars

I had a number of old "scale" 1940's Lionel tank cars. They all had rusted tanks and were near worthless. I've always liked the look of them and they really fit well with other scale cars. They are all metal with heavy die-cast frames so are well worth saving. I just finished my third rebuild. I have done two Shell cars and the last one was done with the Ethel Brand. I remember my Mom always asking for Ethel when she bought gas so when I saw an old Walthers decal set for sale I bought it. In fact that's the hard part about saving the tank cars. Not many decals available for them. Driving with my parents as a kid I remember long strings of black tank cars on the Southern Pacific Railroad. Wish there were more decal sets for these old tankers. Don