Thanks to you both for you honest and timely replies.
Rattler21, I had thought of your suggestion before, but I don't currently have enough hands to be able to safely/evenly roll the entirety of the train, which is 2 engines and 5 cars, over on its side. (I dropped one car from the set because I just couldn't get the I/R on that one car to work properly within the set.) I was hopeful that some ingenious person had figured out a lubrication technique that did not require "upsetting" the tedious I/R connections.