Some unexplained scuffmarks have appeared on a new white ceramic basin fitted recently which I can't remove using the usual cleaning agents.
Does anyone know what they might be and how to remove them?
Possibilities might include a paint tin or plastic bowl 'scuff', or newsprint ink. Definitely not hairline cracks despite being on the curved rim of the basin.
Strange thing is, this happened before on a white basin I fitted last year which has been in daily use and the scuffmarks marks still remain. Can't 'feel' any change in surface texture, marks 15 - 25 mm long, 0.5mm to 2mm wide, dark grey in colour. Annoying!
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