Installing acylic frameless windows

Installing externally mounted frameless acrylic windows (deadlights) in a 1968 Alberg 30. I use 3/8" Plexi-G medium gray #2064 to reduce the glare of the sun but allow good visibility out. It also provides some privacy and appears like a dark mirror when the outside light is brighter than inside. I've been buying full sheets of Plexi from Farco Plastics of Jacksonville, FL and picking it up myself to avoid shipping costs. But you can order smaller pieces form online suppliers to reduce shipping costs. This one looks good: https://www.estreetplastics.com/Plexiglass-Grey-Smoked-3-8x24x48-p/t803752448.htm