Plexiglass is commonly used in window panes because it is stronger than conventional glass. For this reason, it is better to use plexiglass in places where damage is likely to occur, and the use of this material has become much more common. However, most plexiglass varieties aren’t scratch-resistant and even the most expensive type develops scratches over a period of time. Replacing this material can be expensive, so it is best to try to fix the scratches on your own first.
Step 1 - Prepare Glue
Spread some glue on a small sheet of paper and allow it to dry. You'll only need to use regular school glue rather than an industrial strength adhesive. As it dries, the glue should develop a distinct upper coating. Dip a cotton swab into the drying glue and apply directly over the scratched surface, being sure to dab rather than smear it. Then, allow the glued scratches to dry for about an hour.
Step 2 - Scrub Excess Glue
Using a moist sponge, repeatedly rub over and around the glued scratches. This ensures that any excess glue is removed and only the required amount is embedded into the scratches. Let this dry for about an hour once you're finished.
Step 3 - Polish the Scratches
There are a few products that can help you polish out the scratches. Multi-application polishes are sold as polishing kits, containing two-or-three creams that each have a specific role. For example, one cream can neutralize the edges of the scratches or fill in the groove. Each cream should be applied according to the packaged instructions. Typically, such polishes yield a satisfactory result since every aspect of removing the scratch is addressed.
Single-application polishes are usually sold as sprays and are very easy-to-handle. You only need to spray the scratched surface and wipe-it-clean. Most of these polishes contain dust-repellants as well, to deter debris and dust from settling around the scratched surface.
In order to apply the polish of your choice, begin by shaking the container so that you evenly distribute all of the chemicals. Use a cotton swab, or the attached applicator for cream-based polishes, and squeeze-out some liquid on it. Then, dab the scratched plexiglass with the polish. If you are using spray polish, simply spray it on the scratches. Using a clean piece of cloth, rub your choice of product into the scratches. Do this repeatedly, using a side-to-side motion. You can also do this in circular strokes to cover more area with every stroke. When you're finished, allow the polished plexiglass to dry for a few hours before wiping it down with a clean, dry cloth.