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 - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
... [Read Article]
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