How to Prepare Bathtub For Refinishing?

HF Acid 

Hydrofluoric Acid (HF) is one of the most potent acids. It is extremely dangerous to touch and can burn the skin. It is often used in industrial settings to etch glass. However, it is also a powerful bathtub refinishing agent that removes the shiny finish on tub surfaces. In addition to this, it also creates microscopic pinholes in the surface, making it less slippery. When used on a regular basis, the holes will fill up with residue. If HF acid is used to prepare the bathtub for refinishing, it is imperative that the technician be trained to handle the chemicals properly. 

(To learn more about our miracle method bathtub refinishing process or to request an estimate, schedule an appointment with us today! Click here:

The process of refinishing a bathtub is relatively inexpensive and can help to restore a dingy bathtub to its original look. The process involves removing old finishes from bathtubs and starting from scratch. It may take up to a day to complete. During this time, homeowners should avoid using the tub for the day. The process can be disruptive, so you may want to move out for a few hours before it’s completed. 


Preparing the bathtub for refinishing begins with a proper cleaning process. The tub must be free of any soap residue, stains, and filmy particles before the refinishing process can begin. Then, a hand sanding process is used to scuff the surface and prepare it for the primer and finish coat. 

Epoxy coatings require a 24 to 48-hour dry time. However, some products take longer to cure. Follow the manufacturer’s instructions regarding drying time and application method. Make sure to work in a well-ventilated area and remove any hardware before proceeding. 

Applying lacquer thinner 

If you are planning to refinish your bathtub, you may want to first apply lacquer thinner to the surface. The thinner helps the paint adhere to the surface. Then you should wipe off any dust and residue with a clean cloth. If you see any tool marks, rub the corresponding area with lacquer thinner to remove them. 

After applying the lacquer thinner, you should wait a few minutes before applying a refinishing product. You can also use a bathtub repair product to restore any cracked or damaged surfaces. After the product has cured, you can then sand the bathtub smoothly. You can use 400 or 600-grit sandpaper. After this, you can apply the paint. The bathtub should be dry, otherwise, it will be difficult to adhere to the paint. 

Ventilating bathroom before refinishing 

To ensure a safe and effective bathtub refinishing project, proper ventilation is crucial. You can use a box fan or install a window or door to allow plenty of air to circulate. The chemicals used for bathtub refinishing can be hazardous if they are breathed in, so be sure to ventilate your bathroom thoroughly before you begin. Using an exhaust fan will also help ensure that the fumes do not linger for too long. 

While most DIY bathtub refinishing kits don’t contain powerful stripping agents, you should still ensure that the room is well-ventilated. You should open windows, turn on an exhaust fan, and install an extra exhaust fan if possible. This is important because some chemicals are heavier than air and could sink into the tub and become trapped there. 

Cleaning the tub multiple times 

Before refinishing a tub, it is important to clean it thoroughly. The first step is to use a mild dish soap and water solution to scrub the surface. Make sure to scrub the soap scum off the surface, too. Then, use a rag soaked in mineral spirits to remove any remaining debris. 

If the bathtub has caulking, you will need to remove it before applying the refinishing agent. This step is critical because the refinishing agent will not bond properly if the surface is not clean. You can also use a putty knife or aggressive scrubbing pads to remove the remaining caulk.