Whenever you take a bath or shower, water and soap will inevitably cause rust stains on the fiberglass tub. Removing rust stains from fiberglass tubs can be a frustrating and time-consuming task. Here are seven methods to try.
Tubs have been around for centuries, and they have served many purposes in the household. While they are often seen as luxurious items, tubs are also practical. They are a convenient way to take a bath or shower. Fiberglass is a popular material used in the making of tubs because it is strong and lightweight. However, fiberglass is not immune to rust and corrosion.
There are several ways to remove rust stains from fiberglass tubs. In this article, we will discuss seven methods that you can try. Hopefully, one of them will work for you.

How to remove rust stains from fiberglass tub
fiberglass tubs are prone to rust stains, especially if they are not properly maintained. Rust can discolor the tub and make it difficult to clean. If you have rust stains on your fiberglass tub, there are a few simple methods you can use to remove them.
One way to remove rust stains from a fiberglass tub is to use a pumice stone. Pumice is a natural abrasive that can be used to scrub away rust stains. Wet the pumice stone and rub it over the rust stain in a circular motion. Be sure to Rinse the area well after scrubbing to remove any pumice particles.
What will you need
To remove rust stains from a fiberglass tub, you will need:
- Lemon juice and cream of tartar (or white vinegar and baking soda) to create a cleaning solution
- A soft-bristled brush (such as an old toothbrush) to scrub the stain
- A spray bottle or a bowl to mix and apply the solution
- Water for rinsing
If you’re using commercial rust remover, you may need additional materials such as rubber gloves, goggles, and protective clothing. It’s always important to read the product’s instructions and safety precautions before using it.
Steps to remove
Here are the steps to remove rust stains from a fiberglass tub using lemon juice and cream of tartar:
- Mix equal parts lemon juice and cream of tartar to create a paste.
- Apply the paste to the rust stain and let it sit for at least 30 minutes.
- Use a soft-bristled brush to scrub the stain gently.
- Rinse the area with water to remove the paste and the rust stain.
- Dry the area thoroughly with a clean towel.
Here are the steps to remove rust stains from a fiberglass tub using white vinegar and baking soda:
- Mix a solution of 1/4 cup baking soda and 2 cups white vinegar.
- Apply the solution to the rust stain using a spray bottle or a bowl.
- Let it sit for at least 30 minutes.
- Use a soft-bristled brush to scrub the stain gently.
- Rinse the area with water to remove the paste and the rust stain.
- Dry the area thoroughly with a clean towel.
Note that if the rust stains are heavy or have been there for a long time, you may need to repeat the process several times or use a commercial rust remover. And always remember to test any cleaning solution on an inconspicuous area of the tub before using it on a stain to ensure that it does not damage the surface.
Frequently Asked Questions
Here are some frequently asked questions about removing rust stains from a fiberglass tub:
Can I use bleach to remove rust stains from a fiberglass tub?
Using bleach on a fiberglass tub may cause damage, so it is not recommended. Instead, use a solution of lemon juice and cream of tartar, white vinegar, and baking soda, or a commercial rust remover specifically formulated for use on fiberglass.
What if the rust stain is still there after I have cleaned it?
If the rust stain is still present after cleaning, try repeating the cleaning process or using a stronger cleaning solution such as a commercial rust remover. If the stain persists, it may be permanent and will require professional cleaning or resurfacing.
Can I use abrasive scrubbers on a fiberglass tub to remove rust stains?
No, abrasive scrubbers such as steel wool or scouring pads can scratch and damage the surface of the fiberglass tub. Only use a soft-bristled brush or sponge to scrub the rust stain.
Are there any precautions I should take before using commercial rust remover on a fiberglass tub?
Yes, before using a commercial rust remover, be sure to read the product’s instructions and safety precautions. Wear gloves and goggles, and work in a well-ventilated area. Avoid contact with skin and eyes and follow the manufacturer’s instructions for safe use and disposal.
Conclusion
In conclusion, rust stains on a fiberglass tub can be removed using a solution of lemon juice and cream of tartar, white vinegar, and baking soda, or a commercial rust remover specifically formulated for use on fiberglass. It’s important to test any cleaning solution on an inconspicuous area of the tub before using it on a stain to ensure that it does not damage the surface.