Acrylic is commonly known as Plexiglas. Same stuff as used in aircraft windshields, canopies and windows.
Polycarbonate is also known as Lexan. Used in motorcycle helmets, most motorcycle windshields and safety glasses.
Polycarbonate is much tougher than acrylic, but it is nearly impossible to remove scratches from polycarbonate.
With regards to polycarbonate's chemical resistance, I had a crack develop in one of the lenses of my PC eyeglasses. When I was getting new glasses, the optician looked at my old glasses and asked "did you use Loctite on your screws?". It turns out that one drop of loctite on PC will cause it to crack.
You can get sheets of acrylic that have a layer of some sort of plastic sandwiched in the middle. This stuff doesn't break as easy as regular acrylic, but it's much cheaper than Lexan.
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Today's Featured Article - George's Fordson Major - by Anthony West (UK). This is a bit of a technical info to add on to the article about George's Major in the "A Towny Goes Plowing" article. George bought his Major from a an implement sale about 18 years ago for £200.00. There is no known history regarding its origins or what service it had done, but the following work was undertaken by Harold alone to bring it up to show standard. From the engine number, it was found that the major was produced late 19
... [Read Article]
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