How to Get Rid of Scratches on Fiberglass

Quck answer

To remove scratches from fiberglass, follow these steps:

1. Clean the surface: Start by washing the fiberglass with a mild soap and water to remove any dirt or debris.

2. Sand the scratch: Use a fine-grit sandpaper to gently sand the scratch in a circular motion. Be careful not to apply too much pressure.

3. Apply rubbing compound: Apply a small amount of rubbing compound to a clean cloth and gently rub it into the scratched area using circular motions.

4. Polish the surface: After the rubbing compound has been applied, use a clean cloth to polish the surface and remove any excess compound.

5. Apply wax: Finally, apply a coat of wax to protect the fiberglass and restore its shine.

By following these steps, you can effectively remove scratches from fiberglass and restore its original appearance.


To successfully remove scratches from fiberglass, it is important to determine whether it is a project you can handle on your own. While it is commendable to approach small repairs in your bathtub or shower with enthusiasm, it is also important to be realistic. This is the balance you should strive for when assessing scratched fiberglass. There are two low-risk methods that can help you get started.

Step 1

Clean the fiberglass with soapy water and a sponge to get a clear view of the scratch. The depth of the scratch, not its length, will give you a good idea of the work required. If the scratch is a shallow surface scratch, you should be able to remove it yourself. However, if it is a deeper scratch or one that you can easily fit a fingernail into, it may require the expertise of a fiberglass refinisher.

Step 2

Take a cloth and dip it into a jar of petroleum jelly. Use a circular motion to rub the scratch. You may need to repeat this process multiple times before you notice a significant difference in the appearance of the scratch.

Step 3

If the petroleum jelly does not remove the scratch, apply a small amount of polishing compound to a soft cloth. Rub the compound into the scratch using a circular motion. Use your finger to assess your progress by running it over the scratch. Repeat this process several times or until the scratch disappears.

Step 4

Use a rag to wipe away the compound. If it is safe to do so, apply a layer of fiberglass wax to the surface. Follow the instructions on the wax to properly seal the repair.

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