How to Refinishing a Cast Iron Tub Reader/Buyer. 4.5

How to Refinishing a Cast Iron Tub

Do you have a dull cast iron bathtub? You can visit a home improvement store and find a new tub to replace the old one. But, that can cost a lot of money, hiring a contractor, removal, landfill fees, plumbing, and demolition of your new bathtub.

How about installing a liner? A liner can cover up your bathroom problem, but it is still expensive and can leak the water into your tub. So, what should you do?


Refinishing your tub is cost‚Äďeffective and a¬†pretty good option compared to replacement and installing a liner. Refinishing can be a viable option when your cast iron tub is simply rusted and weathered. Read and follow these steps below for cast iron tub refinishing DIY. Check this out!

Cast Iron Tub Repair Kits

Cast Iron Tub Repair Kits

Cast Iron Tub Refinishing: Materials

–¬†¬†¬†¬†¬†¬†¬†¬†¬† Trisodium¬† phosphate degreasing cleanser
–¬†¬†¬†¬†¬†¬†¬†¬†¬† ¬†Steel wool

–¬†¬†¬†¬†¬†¬†¬†¬†¬† Sand paper

–¬†¬†¬†¬†¬†¬†¬†¬†¬† Cleaning rags

–¬†¬†¬†¬†¬†¬†¬†¬†¬† Trowel

–¬†¬†¬†¬†¬†¬†¬†¬†¬† Fiberglass putty

–¬†¬†¬†¬†¬†¬†¬†¬†¬† Enamel bonding agent

–¬†¬†¬†¬†¬†¬†¬†¬†¬† Paint: acrylic urethane enamel or epoxy paint

–¬†¬†¬†¬†¬†¬†¬†¬†¬† Acrylic primer

–¬†¬†¬†¬†¬†¬†¬†¬†¬† Paint spray

–¬†¬†¬†¬†¬†¬†¬†¬†¬† Gloves

–¬†¬†¬†¬†¬†¬†¬†¬†¬† Masking paper

–¬†¬†¬†¬†¬†¬†¬†¬†¬† Painter‚Äôs tape

–¬†¬†¬†¬†¬†¬†¬†¬†¬† Drop cloth

Cast Iron Tub Refinishing: Steps

Cast Iron Tub Refinishing

Cast Iron Tub Refinishing

1.  Use trisodium phosphate degreasing cleaners to scrub the cast iron tub down. Remove all foreign residues, particles, rust and stains from the tub with steel wool. In large rust spots, you can use sandpaper to scrape it away.
2. Rinse the cast iron thoroughly. Use wet rag plus liquid cleaner to clean the tub from every speck of dirt and rust. In two hours, let it air dry. Make sure when you are doing the next step, the tub is completely dry.

Cast Iron Tub Refinishing Kit

Cast Iron Tub Refinishing Kit

3. Before you do refinishing, fix any holes, scratches, cracks, and nicks. Prepare the fiberglass putty. Hardening agent and putty are come in most of putty kits. Use a trowel to take fiberglass putty and fill it into the problem area. Make sure you apply the putty as flat and close to the tub surface as possible. And then, sand the fixed area.
4. Protect the area that you don’t want to refinish such as faucets, walls, floors and hot and cool water knobs. Use a masking paper and painter’s tape to cover them.
5. To help the finished result look good and help your paint perfectly adhere on the surface of tub, apply a thin layer of the enamel bonding agents with the use of a rag. You should wait about 2 hours until the applied stain is completely dry.
6.¬†Take a paint sprayer and pour an acrylic primer into the reservoir. Keep¬†a distance¬†of ¬†8 ‚Äď inches between the tub and the paint spray when applying a fine coat of acrylic primer. This step has the purpose to create a beautiful finish. You should wait until the primer is completely dry¬†for at least three hours. If you¬†don’t have¬†any paint spray, you can apply the primer with paint brush.

Cast Iron Tub Refinishing Cost

Cast Iron Tub Refinishing Cost

7.  Finish the refinishing of your cast iron tub with painting it. Remember to avoid using a latex paint on your cast iron tub. Acrylic urethane enamel or epoxy paint is really perfect for the right look. You can use a paint brush to apply the thin coats of paint. In 5 hours, once the first coat has dried, apply the second coat of paint. Let it dry perfectly before you use the tub.


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