Article: Some bathtubs are not freestanding fixtures and are housed within a painted housing. If your bathtub is set within a wood or plaster housing, use painters tape to tape off the edges of the tub to prevent the new bathtub reglazing from getting on anything other than the tub itself. If your bathtub is free standing, you can skip this step. Everything that’s staying in your bathtub that isn’t the bathtub itself needs to be covered before you start the refinishing process. Make sure the shower head, any exposed plumbing, bath nozzle and anything else you don’t want refinished is covered in plastic. Once you cover things in plastic, use painters tape to secure the plastic in place. The walls of the shower should be covered if they’re not a part of the tub itself. You can hang masking paper or loose plastic from the wall using painters tape to secure it in place. If the shower walls are a part of the bathtub, you may want to refinish them along with the tub, rather than taping them off. Iron tubs need a bonding agent to help the new finish seal in place. Some bonding agents can be painted on while others need to be sprayed on. Follow the directions on the agent you purchase closely for good results.  You can buy bonding agents for iron tubs at your local hardware store. Be sure the bonding agent is completely dry before applying the new finish. Reglazer, or finish, is like a thick paint that you’ll apply to the tub to serve as its new surface. Some tub glazes come in self contained cans for you to spray on, while others are meant to be mixed and applied using rollers or paint brushes. If yours needs to be mixed, follow the directions on the package closely to ensure the mixture comes out right.  Different finishes require different approaches, so it’s best to follow the instructions on your label. You will need to purchase “reglazer” or a bathtub “finish” that’s made specifically for bathtubs. You can usually find it at your local hardware store.
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Tape off the edges of the tub with masking tape. Wrap the spout, handles and anything else that’s not the tub in plastic. Use paper or plastic to cover the walls of the shower. Apply a bonding agent to the surface of the tub if it’s made of iron. Mix some reglazer per its instructions.