Diagnosing the Problem. If leaves on an aloe plant develop dark spots, it's critical to diagnose and correct the problem quickly. The most likely cause is too much water, which promotes growth of fungal microorganisms that cause spotting of leaves.
If you're painting Plexiglas, not just any paint will do. Some paint may not adhere well, if at all. Acrylic paints work best on Plexiglas, and spray paints designed for plastic work as well. Clean the Plexiglas with water and a mild soap such as liquid dish soap, rinsing it off thoroughly afterwards. If your goal is for the paint to adhere well, scuff it up with a fine-grit sandpaper; paint doesn't adhere well to slick surfaces, so the sanding gives the paint something to grip.
Other names, such as Lucite (Perspex) or Plexiglass (Acrylite) have all been used when referring to high grade Acrylic. They are all trademark or proprietary brands of acrylic. Like Scotch for tape, or Kleenex for tissue. Some like to use Acrylic to mimic glass without the possibility of breakage, is a valid reason. Acrylic has characteristics that make it superior to glass : a 32mm thick piece of acrylic (just over 1â thick) is supposed to be bullet proof.