I've never tinted windows in a plane before, but it sounds like an interesting challenge! I did a bit of research and found a few options for tinting plexiglass windows. One option is to use a heat-shrink film designed specifically for aircraft windows. Another option is to use a spray-on tint designed for plexiglass. It's important to make sure whatever product you choose is FAA-approved for use on aircraft windows. Good luck with your tinting project, and if you're interested in a sun shade for your plane's windows, you might want to check out https://snapshades.com/ for some options.
