Do DIY bathtub resurfacing kits work? The fact is that bathtub resurfacing kits are mainly sold in home improvement stores and the product is usually an epoxy. The fact is that epoxy resurfacing products don’t have the capability to contract and expand with the drastic temperature change when the surface is heated up when the hot water is turned on in the bathtub. If the resurfacing product can’t contract and expand to adapt to the toe rapture change the coating will usually crack and peel. DIY resurfacing kits also don’t come with a bonding agent which is also known as a primer . The bonding agent is very important this is what bonds the resurfacing product to the surface . Once a product has been improperly applied to the surface the cost of resurfacing increases. The product that has been applied needs to be chemically stripped to be able to properly prep and clean the original surface of the bathtub.