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.
Apply the glue to the scratch in the Plexiglass, taking care not to smear glue on the surrounding unscratched area. Repeat for any other scratches on the Plexiglass. Allow the glue to dry for at least 30 minutes. Dampen the soft cloth and wipe over the area to remove any excess glue from around the scratches.ave. Plexiglass is used, in most cases, to replace windows or other glass furnishings. It is commonly used in places where damage from the elements would break real glass. A greenhouse is a great example of this. Because of this exposure to rain, hail and falling leaves and branches, Plexiglass often becomes scratched.