I’d like to clean my pre-war tinplate freights (mostly 800 series, and some lithographed cars).
Some of the cars have a paper glued to the underside of the frame with lubrication instructions, and I don’t want to get this paper wet - thereby more or less ruling out dish soap and water cleaning for these cars.
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how do I best clean the cars with the paper?
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Is it a good idea to use dish soap and water on those which have no paper?
(I’ve rejected the idea of removing the bodies from the frames as I think some of the metal tabs would likely break.)
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I also am interested in cleaning a set of mojave 610, 612 passenger cars without destroyiong the paper on the frames. Post-war trains are a lot easier to work with but tin plate presents a whole new set of problems. I would like to replace the cello windows and rewire for the lights without too much disassembling. Once that can be done, it was suggested to spray some Pledge on a rag and apply it to the body of the cars.
I want these trains to lok desent running,not packed away to be admired. If you get any info , pass it on!!
The paint / decoration on many Lionel prewar tinplate trains are very delicate. I’ve seen their red paint just wash away with plain water.
Louis Hertz recommended using a light oil with a clean, soft cloth to gentlly clean tinplate, Test First in a hidden area. I have had good sucess using a light oil, such as 3-in-1.
I wouldn’t expect to be able to clean an old piece to factory new. Some dirt is going to remain.
But isn’t that part of the charm? 
As an aside, Hetrz also recommended against polishing.
Thanks for the suggestions.
Anyone else have any worthwhile advice for cleaning tinplate?
Do the paper stickers really matter?
I have some cars without stickers that I was thinking of washing with liquid kitchen soap and warm water , as I do with postwar bodies (with tinplate it would be the whole car). If they turn out nice, maybe I should just forget about the stickers - the cars are nice, but not like new, so do the stickers really affect the value? 'Though they are nicely nostalgic.
just ruminating,
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I would follow CW’s advice above. Better to be safe than sorry.
Robert
http://www.robertstrains.com/