Guys, @bigkid makes a really good point worth considering. Especially for long-term storage.
I discovered the hard way, that plastic bags will leave residue over time on your train cars. Now maybe because I do so much repainting, and maybe that paint is having more of an effect on the plastic bags than would the factory applied paint job. I no longer use plastic bags, save for very short-term use, like transporting train cars to an event or show.
I don't know about the long-term quality of the plastic bags that were being used by the manufacturers for brand new boxed train cars.
And @Lionelski, the newspaper plastic bags are the worst. Yeah, perfect size, but they're made as cheaply as possible and they break down much faster. Think about it: Their purpose is to keep your newspaper dry for you to read. Very short term purpose. So I'm sure they're manufactured with that in mind.
For my storage train shelves, I now use a piece of acid-free paper folded into a channel that the train car can slip into, for dust protection.
