Fixing a chipped bathtub is a do-it-yourself project that will save you from hiring an expensive professional. Whether your tub just has a few small chips, or it is badly damaged and needs to be refinished, these are both projects that you will find kits for at your local home improvement store. With a little elbow greasy, your tub will look like new in just a matter of days!
It’s easiest to start with a small amount of epoxy and add more layers than it is to put too much on and remove it. Let the epoxy dry, then sand down the surface with 400-600 grit sandpaper. Follow the directions on your epoxy kit to let it fully dry. Gently sand the surface with 400- or 600-grit sandpaper until it feels smooth like the rest of the tub.
Some epoxy will set in 2-3 hours, at which point you can sand. Other kits may advise you to wait up to 24 hours before sanding. You can add another layer of epoxy after sanding if you can still feel the chip. Then repeat the process. Your refinishing kit should come with sandpaper to use. If your kit didn’t come with sandpaper, then start with 400-grit sandpaper and work your way up to 2000-grit.
Increase the grit of the sandpaper in increments of 200 until you reach 1000-grit sandpaper, then go up in increments of 500 until you end using 2000-grit sandpaper. Repair any chips or cracks in the tub with a 2-component epoxy chip repair kit. Follow the instructions to mix the two parts of the epoxy in a small tray.
Use a small brush, spatula, or the bottom end of a matchstick to apply thin layers of epoxy to any chips. Wait 2-3 hours until the epoxy dries and sand the patches down with 2000-grit sandpaper to match the finish of the rest of the tub. This will ensure that the tub has no chips or cracks and seal the surface before you apply the new finish.