Refinishing a bathtub is one of the most cost-effective and transformative ways to give your bathroom a fresh, clean look without the high price tag of a full replacement. Whether you're dealing with chips, stains, or a dull surface, refinishing restores the tub to a like-new condition, extending its life and improving the aesthetics of your space. Below is the ultimate step-by-step guide to refinishing your bathtub, ensuring a professional-looking result every time.

What Is Bathtub Refinishing?

Bathtub refinishing also known as reglazing or resurfacing is the process of restoring the surface of an old bathtub to improve its appearance and functionality. This involves repairing chips and cracks, sanding down the original finish, and applying a new coating that mimics the look and feel of a brand-new tub.

Tools and Materials You’ll Need

To complete the project successfully, gather the following materials:

Protective gloves and safety goggles

Respirator mask (for fumes)

Painter’s tape and plastic sheeting

Heavy-duty cleaner or degreaser

Putty knife

Epoxy filler or bathtub repair kit

Sandpaper (120, 220, and 400 grit) or an electric sander

Tack cloth

Primer for porcelain or fiberglass

Bathtub refinishing kit (usually includes epoxy-based topcoat)

Foam rollers and brushes

Ventilation fan or open windows

Step 1: Prepare the Work Area

Before starting, make sure the bathroom is well-ventilated. Open windows and use fans to ensure adequate airflow. Cover nearby surfaces walls, floors, fixtures with plastic sheeting and painter’s tape to prevent overspray and protect them from chemicals.

Step 2: Clean the Tub Thoroughly

Use a heavy-duty cleaner or degreaser to remove all traces of soap scum, oils, and mineral deposits. Pay special attention to corners and edges. Rinse thoroughly and let the tub dry completely. Any remaining residue will prevent the new coating from adhering properly.

Step 3: Repair Surface Damage

Inspect the tub for cracks, chips, or deep scratches. Use an epoxy filler or a bathtub repair kit to patch these imperfections. Apply the filler with a putty knife and smooth it out as evenly as possible. Allow it to cure fully according to the manufacturer’s instructions before sanding.

Step 4: Sand the Surface

Sanding is crucial for ensuring the new coating bonds properly. Use 120- to 220-grit sandpaper (or an electric sander) to scuff the entire surface of the tub. For final smoothing, use 400-grit sandpaper. Wipe down the tub with a tack cloth to remove all dust and debris.

Step 5: Mask and Protect Surrounding Areas

Apply painter’s tape around the edges of the tub, including where it meets the walls and floor. Cover fixtures and drains with tape or plastic. Any unprotected area is vulnerable to overspray and drips.

Step 6: Apply a Primer

A high-quality primer designed for porcelain or fiberglass ensures the topcoat adheres properly. Use a foam roller or spray gun to apply an even layer. Allow the primer to dry completely, typically for 1–2 hours depending on humidity and temperature.

Step 7: Apply the Topcoat

Stir the refinishing coating thoroughly before application. Using a foam roller or high-density brush, apply the first coat evenly, working quickly but carefully to avoid bubbles and streaks. Wait the recommended drying time (usually 1–2 hours), then apply a second coat.

For best results, apply 2–3 thin coats rather than one thick layer. Be mindful of drips and use long, smooth strokes to maintain consistency.

Step 8: Allow Proper Curing Time

Once the final coat is applied, allow the bathtub to cure undisturbed. Most coatings require at least 24 to 48 hours before the tub can be used, but some products may require up to 72 hours for full hardness. Do not touch or place objects on the surface during this period.

Step 9: Remove Tape and Reinstall Fixtures

Carefully remove the painter’s tape and protective coverings. Reinstall any fixtures that were removed, and inspect the finished surface for evenness and durability. If needed, lightly sand and polish for a perfect shine.

Additional Tips for Long-Lasting Results

Avoid abrasive cleaners: Use non-abrasive, mild cleaners to maintain the refinished surface.

Do not use bathmats with suction cups: They can damage the coating.

Fix drips promptly: Leaking faucets can wear down the finish.

Refrain from using bleach or harsh chemicals: These can discolor or deteriorate the new coating.

Is Professional Refinishing Worth It?

While DIY refinishing can yield excellent results, some homeowners may prefer to hire professionals, especially for tubs in very poor condition or unique materials. Professional services typically cost $300–$600, compared to $50–$100 for a DIY kit.

However, with the right preparation and attention to detail, DIY bathtub refinishing can offer high-quality, long-lasting results for a fraction of the price.

When Should You Replace Instead of Refinish?

Refinishing may not be the best option in every case. Consider full replacement if:

The tub has structural damage

You want to change the shape or size

There is severe rusting or leaking

You're undergoing a full bathroom remodel

Otherwise, refinishing remains a smart, sustainable, and budget-friendly choice for most homeowners.

Conclusion

Refinishing a bathtub can breathe new life into your bathroom and delay the need for costly renovations. By following the above steps with precision and care, you can achieve a professional-grade finish that lasts for years. It's a rewarding DIY project that offers substantial savings and a major visual upgrade.