Things You'll Need
Scrubbing sponge or brush
Scale can build up on vinyl liners very quickly if the liner is in regular contact with water that contains a high amount of minerals. Lime and other minerals will build up on the vinyl to form a scale-like coating that is unattractive and that will also discolor the vinyl if it is not removed. Removing scale from vinyl liners can be done quickly if the scales are recent but more effort will be needed if the deposits have built up over time.
Clean the liner with warm water and a mild detergent to remove any additional dirt or debris from the liner. Scrub at the scale with a scrub brush or scrubbing sponge to remove some of the scale and let the liner completely dry.
Test a scale remover such as a muriatic acid on a small section of the liner to test for damage. If it discolors or otherwise hams the liner, use a different scale remover. Wear rubber gloves and eye protection since scale removing agents are corrosive in nature. Read the container to make sure the cleaner is suitable for vinyl.
Apply the scale remover to the vinyl and allow it to sit for at least 15 minutes. Follow all application instructions on the container.
Scrub at the scales with a scrub brush to remove them.
Rinse the liner thoroughly with a hose to remove the remainder of the scale and the scale remover.