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 a Faux Finish To The Counter. Prime counter, then apply a base coat in the color of your choice. Then using a sponge or rag, dab on a different color as a top coat. You can experiment with how much paint to add to the rag and create very interesting designs. If you are nervous about the design, you can purchase a special faux finish tool (looks like a mini paint roller) that will create a faux finish very easily.