I made a transparent train some years ago. Lots of fun. It started when I purchased a clear cattle car and caboose at a TCA NOR-CAL Cal Stewart meet. The Southern good ol' boy who had them on his table said that he stripped the paint with either "Soil Love" or "Soy Love." His accent was thick enough that I could not tell which and did not want to ask him too many more times. I have never found either one of those cleaning items.
[ I just found Soilove on Amazon] Not sure if this is it or not.
https://www.amazon.com/Soilove...1319134886&psc=1
The difficulty I have had in stripping clear body trains is finding something strong enough to strip the paint, but not so strong as to dull the plastic. It seems like some of the paint strips easily and the rest of it hangs on stubbornly while the stripped portion starts to cloud while soaking.
I found a clear tender shell on eBay. Using a 2056 for motive power, or a "platinum ghost" (or whatever it is called) Lionel clear body F3 set.
The easiest ones to strip are the silver two dome tank cars. many of them were made of clear plastic and they strip almost immediately with spray on oven cleaner. Only leave the cleaner on for a few minutes. Sometimes they will have a clear body, but the tank ends or the dome tops will be colored plastic. If you hold the car up to the light and look through the holes in the frame, you can tell if all parts were made with clear plastic.
The silver cars are the only ones I have been able to strip successfully without clouding the clear plastic.
The cars I have seen are postwar. Most of them were painted silver tank cars, silver action cars, yellow cattle cars, and certain numbers of bright red/plain cabooses.
It's a great idea. Have fun with it!