Yes, clay bars can be reused until they are saturated with contaminants. When the bar is very dirty or difficult to dent, it's time to replace it.

After use, wash the clay bar in clean water to remove contaminants. Store it in a clean, sealed container, keeping it away from dirt and dust.

Clay bars are safe to use on paint, glass and metal surfaces. Avoid using them on unpainted plastics or sensitive surfaces unless recommended by the manufacturer.