After a 25 year absence from model railroading, I'm back again. Thanks to the old train set that my wife decided to incorporate into her Christmas Village; and guess what? It smokes! And the liquid smoke makes it smoke white. As I watched the little train and the white smoke going around the track, I remembered seeing black smoke as a child on the real "James Whitcomb Ribey", a 4-6-2 express from Cincinnati to Chicago. So my question is: does anybody sell a liquid smoke that smokes black or has any model railroader mixed up a concoction that smokes black. I was at the hobby shop yesterday and saw a small bottle of liquid smoke for $7.95 so before I buy it, I wanted to talk smoke. You know, I was watching TV just the other day and saw some footage of a real locomotive somewhere blowing white smoke and I thought my memory was crazy. I was remembering black smoke. Then I saw the Christmas cards on line here with pictures of locomotives blowing black smoke. Please help this old man.