
Refinishing a plastic shower pan can be a great way to enhance its appearance and functionality, saving money and extending its life. The process begins with thoroughly cleaning the shower pan to remove any soap scum, dirt, or grime using a non-abrasive cleaner. After rinsing and drying, the surface is sanded to create a rough texture that facilitates better paint adhesion. Next, a primer is sprayed on, followed by epoxy paint designed for fiberglass surfaces. Multiple coats of paint may be required for complete coverage. Finally, auto wax can be applied to achieve a higher-gloss finish, but only on the sides to avoid creating a slipping hazard.
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What You'll Learn

Clean the shower pan
Before starting the refinishing process, cleaning the shower pan thoroughly is crucial. Start by removing any caulk around the edges with a sharp putty knife or a razor blade, being careful not to damage the shower pan itself. Thrift Diving recommends lightly scraping the shower pan with a sharp razor blade to remove layers of caked-on soap scum, including the curb, but avoid scraping any textured portions. Use the razor blade to remove any caulking on the curb, sides, or floor of the shower pan.
Next, mix 1/2 cup of trisodium phosphate (TSP) with a gallon of warm water and wash the shower pan thoroughly, rinsing well afterward. The TSP may be included in your refinishing kit, or you may need to purchase it separately. You can also use a bleach-based cleaner to wipe down the entire area. If you have tough stains, consider using a cleaner specifically designed for fiberglass to restore the pan's original luster without causing damage.
After cleaning, closely inspect the shower pan for any cracks, chips, or other damage. Small imperfections can be repaired using a fiberglass repair kit, available at most home improvement stores. Follow the instructions provided with the kit, which typically involves mixing and applying a resin compound to the damaged area. Once the repair material has cured, use 220-grit sandpaper to sand it down lightly, blending it seamlessly with the surrounding area. Wipe away the sanding dust with a damp cloth before proceeding to the next steps of your refinishing process.
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Sand the surface
Sanding the surface of your shower pan is an important step in the refinishing process. It helps the paint adhere better to the surface and creates a smoother finish. Here's a step-by-step guide on how to effectively sand the surface of your plastic shower pan:
Start by ensuring the surface is clean and dry. Use a sharp razor or putty knife to carefully remove any caulk or soap scum buildup around the edges and on the surface of the shower pan. Be cautious not to scratch or damage the shower pan itself. You can also use a non-abrasive cleaner and a soft cloth or sponge to remove any stubborn dirt, soap residue, or grime. Rinse the shower pan thoroughly after cleaning to remove any residual cleaning agents.
Once the surface is prepared, choose the appropriate sandpaper grit for your project. For most plastic shower pans, a fine-grit sandpaper, such as 220-grit, is recommended. Wrap the sandpaper around a sanding block or use a sanding pad to ensure a flat, consistent sanding surface. Start sanding the shower pan lightly, moving in the direction of the grain if there is one. Apply light pressure and use smooth, even strokes to avoid creating scratches on the surface.
Work your way across the entire surface of the shower pan, ensuring you sand all the areas that will be painted. Pay extra attention to any raised surfaces or imperfections that you want the paint to cover. Sanding these areas thoroughly will help the paint adhere better and create a smoother final finish. Take your time and be meticulous in your sanding to achieve the best results.
After sanding, use a damp cloth to wipe away any sanding dust or residue from the surface. It is important to remove all the dust to ensure that the paint will adhere properly. Once you have finished wiping the surface, inspect it closely to ensure that all areas have been adequately sanded and that the surface is smooth and consistent.
If there are any cracks, chips, or imperfections that require repair, now is the time to address them. You can use a fiberglass repair kit to fill in any small cracks or holes, following the manufacturer's instructions. Once the repair material has cured, lightly sand the repaired areas again to ensure a smooth and seamless blend with the surrounding shower pan surface.
By following these steps, you will effectively sand the surface of your plastic shower pan, preparing it for the refinishing process. Remember to take your time, work in a well-ventilated area, and wear the appropriate protective gear, including a respirator and safety goggles, when sanding.
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Apply primer
To apply primer to a plastic shower pan, you must first ensure the surface is clean and prepared. Remove any dirt, soap scum, and leftover caulk with a sharp razor or putty knife, being careful not to damage the shower pan. You can then use a mixture of trisodium phosphate (TSP) and warm water to thoroughly wash the shower pan, followed by a rinse. Next, sand down the surface of the shower pan with 220-grit sandpaper. This will create a rough surface for the primer to bind to.
Before applying the primer, ensure the area is well-ventilated, as primers and paints can produce strong fumes. You may want to wear a respirator for further protection. When you are ready, apply the primer in a light, regular spray from one side of the shower pan to the other. Ensure you cover the entire surface, and you may need to apply two coats of primer for complete coverage. Allow the primer to dry before moving on to the next step of painting.
Some primers may have specific instructions, so be sure to read and follow any directions that come with your chosen product. It is important to take your time and work carefully to ensure the best results when refinishing your plastic shower pan.
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Paint the shower pan
Before you begin painting your shower pan, it is important to clean the surface thoroughly. Start by removing any caulk around the edges with a sharp putty knife or a razor blade, being careful not to damage the shower pan itself. Next, use a non-abrasive cleaner and a soft cloth or sponge to scrub away any soap scum, dirt, and grime. Rinse the shower pan well to remove any residual cleaner. For tough stains, consider using a cleaner specifically designed for the material of your shower pan, such as fiberglass.
Once the shower pan is clean and dry, inspect it for any cracks, chips, or other damage. If you notice small imperfections, use a repair kit to fix them. Follow the instructions on the kit carefully, typically involving mixing and applying a resin compound to the damaged area. After the repair material has cured, use 220-grit sandpaper to sand the area smooth, ensuring it blends seamlessly with the surrounding surface. Sanding will help create a rough surface for the paint to adhere to. Remember to wipe away the sanding dust with a damp cloth before proceeding.
Now, you are ready to start painting. If using a bathtub refinishing kit, follow the instructions provided with the product. Generally, you will first need to apply a primer, which will provide a base for the paint to grip onto. Spray or apply the primer in light, regular coats, ensuring you cover the entire surface of the shower pan. Allow the primer to dry completely before proceeding.
After the primer is dry, it's time to apply the paint. Use an epoxy paint designed for use with the material of your shower pan, such as fiberglass. Place the paint in your chosen application device, such as a sprayer or roller. If using a sprayer, wear a respirator to prevent inhalation of paint fumes. Apply the paint in thin, even coats, working from one side of the pan to the other. Allow each coat of paint to dry before adding another. Depending on the desired finish, you may need to apply multiple coats of paint.
Once the final coat of paint has dried, assess the coverage of the shower pan. If there are any areas that appear uneven or have been missed, use a small paintbrush to touch them up. Remember to allow the paint to cure for the recommended time before using the shower pan again. Enjoy your freshly painted shower pan!
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Apply wax for a high-gloss finish
To achieve a high-gloss finish on your plastic shower pan, you can apply wax to the surface after the paint has fully cured. It is important to note that wax should only be applied to the sides of the pan and not the bottom to avoid creating a slipping hazard.
There are a variety of wax products available for this purpose, including automotive wax, car wax, and marine wax. When selecting a wax, opt for a natural wax over a synthetic one. A high-grade paste-type automotive wax is recommended for the best results.
Before applying the wax, ensure that the surface is thoroughly cleaned and dried. You can use a handled sponge filled with dishwashing liquid and vinegar to scrub the entire surface, removing any soap scum or mildew. Once the surface is clean, dry it thoroughly using a cotton towel or chamois.
Now, you can proceed to apply the wax. Use a soft cloth to apply the wax by hand, following the application directions provided by the manufacturer. Work in sections if needed. Before the wax dries, use a dry cloth to polish the walls, buffing it to a high gloss.
If you prefer a quicker method, you can use a spray wax. Simply spray the wax onto the surface, let it dry, and then lightly buff it if desired. This type of wax does not require any additional buffing after application.
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Frequently asked questions
To refinish a plastic shower pan, you should start by cleaning the pan thoroughly, removing any soap scum, dirt, grime, or leftover caulk. Next, you should sand down the surface of the shower pan to help the paint stick. After that, you can apply a primer and then epoxy paint. You may need to add multiple coats of paint to ensure the shower pan is completely covered.
You can use a bathtub refinishing kit for your shower pan. If you need to repair holes, cracks, or other damage, use a fiberglass repair kit. There are also specific shower pan refinishing kits available, such as the Rust-Oleum tub and tile refinishing kit, the Homax tub and tile refinishing kit, and the ArmoGlaze Shower Base Refinishing Kit.
This depends on the product you are using. Some products require 24 hours to dry, while others may need a few days.
To remove paint from a plastic shower pan, you can try sanding the surface to remove the old paint. If there is caulk that needs to be removed, you can use a sharp putty knife or a razor to scrape it off.











































