Lexan, which is a brand name for polycarbonate, has 250 times the impact resistance of glass. Its strength makes it an extremely popular plastic for high-stress applications. While Lexan is extremely strong, like all plastics, it is susceptible to scratching. Unlike glass, scratches in Lexan can be buffed out easily. Use a plastic buffing compound and a few simple restoration techniques to remove tiny scratches from Lexan, avoiding the cost of a replacing the plastic.
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Things you need
- Concentrated liquid washing powder
- 100 per cent cotton rags
- Acrylic buffing compound
- Plastic polish
Wash the scratched area thoroughly with a mixture of hot water and concentrated liquid washing powder. Use a ratio of 2 tsp of detergent to 473ml of hot water. Use a 100 per cent cotton rag to clean the scratched surface. The surface must be cleaned because loose dirt can further scratch the Lexan during the buffing step of this project. Allow the washed surface to completely dry.
Apply 4 large drops of acrylic buffing compound onto a dry 100 per cent cotton rag. Acrylic buffing compound comes in two strengths, one for light scratches and one for heavy scratches. Use the buffing compound designed for light scratches. This type of scratch remover is in a liquid form and contains a mild abrasive. Acrylic scratch removal techniques are used for Lexan as well.
Rub the buffing compound in a circular motion, which prevents creating a noticeable depression on the plastic's surface. Add more buffing compound to the cotton rag as needed. Wipe down the surface of the Lexan and check to see if the scratches are gone. If the scratches have been buffed out, proceed to Step 4. If scratches remain, continue to buff them. Once the scratches are removed, wipe the surface down with a clean cotton rag.
Apply 1 tsp of plastic polish (not buffing compound) to a clean, dry rag. If the plastic polish is in a spray bottle, lightly spray the previously buffed area. Using a clean dry cotton rag, rub the polish in, using a circular motion similar to that used in Step 3. Rub the polish into the Lexan until it blends in with the rest of the surface's finish.
Tips and warnings
- Lexan is buffed and polished with the same techniques and compounds used for acrylic. Plastic conditioners can be used to keep the Lexan from degrading. Most Lexan damage occurs because of the sun's ultraviolet light. This sun damage can cause yellowing and fogging, which affects the clarity of material. Conditioners help keep Lexan from becoming brittle, which reduces potential scratching problems associated with this type of plastic. If removing small scratches from eyeglasses made of Lexan, be careful not to remove any outer coatings on the lenses.
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