What pinholes are
Enamel is a layer of glass fused onto steel or cast iron in a furnace. Small gas bubbles can leave tiny pits in the surface, which pick up dirt and show as black dots. They’re common in enamelled baths, particularly older ones.
Do they matter?
Usually not. They’re cosmetic and don’t mean the bath is failing. But a pinhole that grows, goes orange or brown, or feels rough could be a small chip with rust starting, and that’s worth repairing early.
Cleaning them
A soft brush and a mild cleaner can lift dirt from the pits. Avoid scouring, which dulls the enamel around them.
Filling them
If they bother you, pinholes can be filled as part of a repair, or disappear under a full re-enamel. Send us a photo and we’ll advise.
Every job is different. Send us a photo and we’ll tell you what we’d recommend for your bath, sink or surface.
