Cleaning Ceramic Surface - what abrasive?

If it is from an angle grinder nothing will work. The hot spark melts the thin glass surface on the ceramic and the metal particles embed themselves into the glass. Over time the particles (if steel) will rust as well. The Formica and plastic survive somewhat better as the sparks tend to bounce off them rather than adhere.

If you want to experiment with cures just hold a sheet of glass in the sparks from an angle grinder to create test panel to try things on.

I have a very sad tale about a Triumph 2000 windscreen that turned into an abrasive pad as far as windscreen wipers were concerned after using an angle grinder on the bonnet.

ah, the old triumph 2000 / 2.5 PI. fantastic cars.

RT

The black specks are bits of grinding disk and steel that have welded themselves to the soft ceramic glaze - the only thing I can think of that might improve the appearance is treating it with some sort of acid to dissolve the iron component (which will otherwise rust and cause staining) but I suspect that won't remove all the marks, and even if it did you'd be left with the little craters that have been burned.

In article , "Peter Parry" snipped-for-privacy@wpp.ltd.uk says... .

Been there, done that - but it was only the inside of a Mini screen, so not so important or hard to replace.

It may be that treatment with brick acid (HCl) will at least get the iron out of the pits. If that is what it is.

I fear it is.