In article ,
nomit wrote:
Also wierd things have happened to the bathroom ceramic sink. There
are metal coloured (like scredriver metal) thin scrathes inside and
outside the sink bowl that are neither indented nor raised and don't
rub off. not really sure what they are as the sink is all ceramic?

Have you tried Jif Cream? You need a good old fashioned scouring powder
rather than the more modern low effort chemicals.

--
*Born free...Taxed to death.

Dave Plowman London SW 12
RIP Acorn