Stephen Judge wrote:
Trying to tidy up a slate surface that has many shallow
scractches (deepest probably only 0.2mm, most less than
this). Have tried sandpaper, glasspaper, metal sanding
disk, rust removing disk, slow speed, high speed, with and
without water - all to virtually no avail.

People say thaat slate, being a very soft stone, should
sand no problem - where am I going wromg ???

Are you sure it is slate? It could be marble, but that's
a soft rock too, or granite, which may be too hard to
re-finish by hand. What is the article in question? I
would not use a sanding disc on anything that needs to
be flat and smooth. Try a sheet of wet'n'dry or similar
carborundum paper on a flat block, e.g. a piece of planed
timber (use wet if possible with a stream of water).


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