How to Repair a Polycarbonate Windshield Scratch

by Heather Mckinney
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Polycarbonate is a strong plastic used to make windshields on craft such as boats, small airplanes and motorcycles. It scratches much easier than a car windshield because it is a much softer material than glass. Polycarbonate windshields often get scratches from dirt, insects and other debris, making them hazy. This can make it difficult to see through the windshield, especially in the sun. There are products designed to rub out these scratches that are available at most auto supply stores. Properly cleaning and maintaining your windshield will ensure you have maximum visibility.

Step 1

Clean the windshield. Do not use cleaning products, such as Windex or Rain-X, that have a high amount of alcohol or ammonia. These cleaners are harmful to polycarbonate. The safest cleaner to use is warm water with mild, nonabrasive dish soap. Dry the windshield with a soft cotton or microfiber towel.

Step 2

Apply a buffing compound. Make sure the compound you use is a fine grade, which is safe for plastics. Use a soft, clean cloth to rub the compound over the scratches, in circles.

Step 3

Remove the compound. Wash any buffing compound off with warm water and soap. Trying to rub it off without wetting down the surface may result in more scratches.

Step 4

Apply a polishing compound. Again, use a polish that is safe for plastics for this stage. If you choose a polish that contains wax, bugs will be less likely to stick to your windshield.

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