Well it's thinner and more transparent than plastic, doesn't scratch and has the "refractive index" (how "clear" it is) of glass, and is about "scale" thickness. I've used microscope cover glass to glaze all my brass engines. With good scissors, you can easily cut it to shape when held under water.(Yes, it does work!). It's not as fragile as you'd think either. It can be a royal pain to get to stick to plastic car sides and not come loose. Contact cement(Walther's Goo type) works better than most things. I got a lifetime supply of cover "slips" that were rejects from the rock lab when I worked for Cities Service Oil. Big down-side on passenger cars is it doesn't help stiffen the sides of the cars like plastic does, and handling those flexy sided cars can make it pop off. It also doesn't look as good as Micro-Trains' caboose windows which are molded so the "glass" extends thru the window openings. I didn't look at the pricing on the site mentioned, but if it's cheap enough, you might like to try it. Microscope cover "slips" or slides come in a huge variety of thicknesses, down to .001" and made from different kinds of glass. The thinner, the more exspensive it gets and the type of glass makes a huge difference in prices too. All this makes a difference in microscopy, but cheap is all we need.
