During this process, the antifouling residue from a previously applied layer is also removed, so it's advisable to apply a new antifouling treatment. This type of paint is achieved with a resin, a color-giving pigment, and several added products that eliminate mollusks, barnacles, shipworms, snails, algae, and other microorganisms. Millions of these live in the sea and can end up adhering to pipes, propellers, rudders, and sea inlets, as well as the vessel's cooling circuits.