Plexiglass is not very tough and can shatter on impact.
An ordinance manufacturer used 3/8" thick ploycarbonate (GE's "Lexan", "Hyzod", or "Tuffak") for gurds surrounding military grenade assembly machines. We detonated one in a verification test and the sample guard stopped the shrapnel very well. Banks and gas stations use 1 inch thick polycarbonate in those bullet-proof customer windows.
Polycarbonate is tough but surface scratches easily. It's the same material used in modern headlight lenses and those hard-to-open theft-resistant packages. Years of exposure to sunlight can yellow and cloud the surface the same as headlight lenses. The rear windows in 1970's John Deere Sound-Guard cabs appeared to be polycarbonate.
The material cuts and drills easily, is somewhat difficult to bend into shapes, but it welds very strongly with the proper adhesive.
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
... [Read Article]
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