Metal abrasion often occurs in the sink, when pans, cutlery or stainless steel containers are scraped against the sink’s ceramic surface. This is because the glaze on the ceramic sink is harder than metal and the softer material naturally rubs off on the harder material. This metal abrasion can be easily removed without residue using the correct cleaner and a little scrubbing. Suitable cleaners include BioTopp or ceramic hob cleaners, such as Stahlfix Classic.
Scratches, on the other hand, are very rare due to the high degree of hardness of the glaze. They can be caused by quartz, silicon, topaz, corundum and diamond. These materials don’t tend to be found in kitchens very often. Pots and pans or roasting tins with an abrasive surface, ceramic knives, other unglazed ceramics or diamond rings may, however, scratch the ceramic surface. Avoid dragging these objects along the ceramic surface.
Now, back to the original question! The subtle difference lies in the feel: run your fingernail across the area in question. If there is no indent, it is just metal abrasion, which you can easily remove with simple cleaning. If you do feel an indent, then it is a scratch. This means that the glaze has been damaged by a harder material. In this case, please contact your kitchen retailer. They will be able to provide a solution for you.