
Fiberglass shower pans are popular due to their ease of cleaning and affordability. However, they are susceptible to cracking and chipping, which can be unsightly and lead to further issues if not addressed promptly. To restore the appearance and functionality of a fiberglass shower pan, it is possible to skim coat or refinish it. This process involves repairing any damage, such as holes or cracks, and then applying a primer and a topcoat to achieve a smooth, uniform finish. The use of epoxy paint or a two-part epoxy kit specifically designed for fiberglass surfaces is crucial to ensure adhesion and durability. Proper preparation, curing, and drying times are also essential for a successful skim coat application.
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What You'll Learn

Sanding the surface
Step 1: Inspect the Shower Pan
Before beginning the sanding process, it is important to inspect the shower pan for any cracks, chips, or other damage. Small imperfections can be repaired using a fiberglass repair kit, which can be purchased at most home improvement stores. Follow the instructions provided with the kit to ensure a seamless repair.
Step 2: Choose the Right Sanding Tools
For sanding the surface of a fiberglass shower pan, it is recommended to use fine-grit sandpaper or steel wool. If you prefer using sandpaper, opt for a 200-grit or 320-grit option. The goal is to create a scuffed surface without causing deep scratches, so be thorough yet gentle.
Step 3: Wear Protective Gear
Sanding fiberglass can generate particles that can irritate your eyes and lungs. It is crucial to prioritize your safety by wearing a respirator or face mask, safety glasses, and even gloves if desired. This protective gear will safeguard you from any airborne particles during the sanding process.
Step 4: Start Sanding
Begin sanding the entire surface of the shower pan. It is recommended to sand in the same direction as the grain of the fiberglass, if visible, to achieve the best results. Apply even pressure and work systematically across the surface to ensure a consistent scuffed texture.
Step 5: Sanding Technique
When sanding, use long, smooth strokes, and avoid applying too much pressure in one area. Overlapping your sanding strokes can help ensure that you don't miss any spots and achieve a uniform finish. Take your time and be meticulous, as a thorough sanding job will pay off in the long run.
Step 6: Clean the Surface
Once you've finished sanding, it's important to clean the shower pan to remove any dust and debris. Use a damp cloth or a mild cleaning solution to wipe down the surface. Ensure that the surface is completely clean and smooth before proceeding to the next steps of refinishing.
Remember that sanding is a crucial preparatory step that will help the primer and paint adhere properly to your fiberglass shower pan. By following these steps, you'll create a fresh canvas for the new finish, transforming the look and functionality of your shower pan.
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Applying primer
Before applying primer, it is important to prepare the surface of your fiberglass shower pan. Start by sanding down the surface of the pan to remove the shiny finish. This will help the primer and paint adhere better. It is recommended to wear a respirator or face mask and safety glasses to protect yourself from fiberglass particles. Once the sanding is complete, clean the dust and cover the surrounding area, including the drain, with masking tape and tarpaulin.
Now you are ready to apply the primer. Use a spray device to apply a light and regular coat of primer from one side of the pan to the other. Ensure that you follow the instructions on the primer product and apply the recommended number of coats, typically two coats. Allow the primer to dry completely between coats. After the final coat, let it dry before proceeding to the next step.
It is important to note that some sources suggest using an adhesion promoter after the primer to ensure that the paint will adhere properly. You should apply two coats of the adhesion promoter, waiting 10 minutes between each coat, before applying the paint. This step will help prevent the paint from peeling.
Once the primer is completely dry, you can move on to the next step of refinishing your fiberglass shower pan, which is applying the paint. Remember to follow the specific instructions for your chosen paint product.
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Using epoxy paint
Yes, you can skim-coat a fibreglass shower pan using epoxy paint. This is a cost-effective way to refresh your shower or tub without a full replacement.
Epoxy paint sticks better and lasts longer than conventional bathroom paint. It is also highly durable and permanent. The paint usually comes in a kit containing two cans: one with resin and the other with a hardener/catalyst. When these two parts are mixed, they undergo a chemical reaction and harden or cure.
To use epoxy paint to skim-coat your fibreglass shower pan, follow these steps:
- Sand down the surface of your shower pan. Sanding will help the paint find raised surfaces to stick to. Use a sander or steel wool for this step. Wear a respirator or face mask and safety glasses to protect yourself from fibreglass particles.
- Clean the dust and cover the bathroom area with masking tape and tarpaulin. Cover the drain with tape to protect it.
- Spray on the primer. The primer will bind with the sanded surface and provide something for the paint to grip. Apply the primer in a light, regular spray from one side to the other. You may need to apply two coats to ensure that your shower pan is completely covered.
- Once the primer dries, use an epoxy paint designed for use with fibreglass. Place the paint in your spraying device and use a respirator to prevent inhalation of the fumes. Spray the paint from one side of the pan to the other and allow it to dry.
- Add a second coat and allow it to dry. Repeat this process 4-5 times. Allow each coat to dry before adding another.
- Once the final coat of paint dries, assess the coverage of the fibreglass shower pan. Touch up any areas that have not been covered with a small paintbrush.
- Remove the tape around the drain and other parts of the bathroom.
- Allow the paint to cure for at least three days before reattaching any hardware.
- Reattach the hardware and apply new tub-and-tile caulk that matches the epoxy paint colour.
It is important to carefully follow the manufacturer's instructions when using epoxy paint. Make sure to ventilate the work area using fans to pull fresh air into the space and vent the fumes outdoors. Epoxy paint should be applied at temperatures between 50 and 90 degrees Fahrenheit and at a humidity level below 85%.
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Repairing cracks and holes
For hairline cracks, drill a 3/8-inch stop hole at either end to prevent the crack from spreading. For larger holes, scuff the area around the hole with sandpaper, then apply epoxy to the perimeter. Lay a piece of fibreglass mesh cloth over the hole, flattening the edges into the epoxy. Apply one or two more coats of epoxy over the cloth and scrape the epoxy level.
If the cracks or holes are due to a lack of support, you will need to address this first. Drill a series of holes around the affected area and spray high-density foam into the holes until it overflows. Cut the foam so that it is flush with the shower base and make a small indentation for the epoxy resin.
You can find fibreglass resin repair kits and epoxy kits at most hardware stores or online. Some popular options include the Devcon epoxy bathtub repair kit and the Bondo 8 oz. fibreglass resin repair kit. These kits typically include applicators, fibreglass mesh cloth, and mixing tools.
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Maintaining and cleaning
Weekly Cleaning:
- After each shower, use a squeegee or a towel to remove excess water and soil. This simple step will make a huge difference in preventing the buildup of soap scum and body soil, which can make the shower pan dull and hard to clean.
- Open a window or use the exhaust fan to improve ventilation and reduce moisture buildup, which can lead to mould and mildew.
- Wash bath mats and shower curtains regularly, as they can be breeding grounds for mould and bacteria.
Deep Cleaning:
- For a deeper clean, start by removing all bottles and accessories from the shower.
- Turn on the hot water and allow the shower to steam up. This will help loosen any dirt or grime.
- Create a cleaning solution by mixing one cup of baking soda with one-fourth to one cup of white distilled vinegar. You can adjust the amounts based on the size of your shower.
- Apply the paste to the warm, steamed walls and floor of the shower with a non-abrasive sponge or soft rag.
- Let the paste sit for about 10 minutes, then rinse it away with clean, warm water.
- Dry the surfaces completely with a microfiber towel.
Removing Stickers and Stickiness:
- If you have non-slip stickers or removable accessories that leave behind a sticky residue, saturate a paper towel with olive oil and cover the area.
- Allow the oil to work for at least 15 minutes, then use a plastic scraper or a credit card to remove the stickiness.
Preventing Mould and Mildew:
- In addition to improving ventilation and reducing moisture, you can prevent mould and mildew by regularly cleaning shower caddies and nooks, which tend to harbour these issues.
- Wash bath mats and replace them every two years to help prevent mould problems.
Using Store-Bought Cleaners:
- There are also mild store-bought cleaning products suitable for fiberglass. Look for all-purpose cleaners that can eliminate soap scum, grease, and grime, such as Mr. Clean Clean Freak Mist.
- Apply the cleaner directly to a microfiber towel and work in side-to-side strokes to avoid dripping and streaking.
Extra Tips:
- Avoid using abrasive cleaners or tools on fiberglass, as they can scratch or damage the surface, making it harder to clean.
- For hard water spots and stubborn stains, try using vinegar. Soak a rag or sponge in vinegar and wipe it onto the shower pan, or apply it with a spray bottle.
- For extra protection, you can use fiberglass boat wax on the walls to allow water to run off without spotting. Do not use wax on the floor, as it can become slippery.
Remember to always test any cleaning solution on a small area first to ensure it doesn't discolour or damage the fiberglass. With regular maintenance and the right cleaning techniques, your fiberglass shower pan will stay in good condition for years to come.
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Frequently asked questions
Skim coating is a process of refinishing a surface to give it a fresh, clean look. It involves patching holes or cracks, applying primer, and painting.
You will need a refinishing kit that contains a two-part epoxy paint specially formulated for fiberglass shower pans. The kit typically includes epoxy, hardener, application tools, and cleaning supplies. You may also need a separate repair kit to patch any holes or cracks in the shower pan, which typically includes epoxy filler, application tools, and sometimes fiberglass mesh cloth for larger holes.
First, clean the shower pan and mask off the surrounding area to protect it from paint. If there are any holes or cracks, use a repair kit to fill and patch them. Once the filler is dry, sand the area smooth. Next, apply a thin, even layer of primer and let it dry. Finally, apply the topcoat of paint, following the manufacturer's instructions for mixing and application. Allow each coat to dry before adding another, and ensure proper ventilation during the curing process.











































