3 Tips for Removing Calcium Scale With a Pumice Stone

Use the pumice stone wet and gently Pumice is softer than plaster, so it won’t scratch if kept wet and used with light pressure. Rub in small circles without pressing hard.

For larger areas, use a chemical scale remover Choose a product with phosphoric or dilute muriatic acid. Follow the label exactly and neutralize afterward to avoid damage.

Avoid pitting by skipping wire brushes and concentrated acid Pitting comes from letting acid sit too long or using a wire brush. Patience is cheaper than replastering.