If these are metals then you would really be better off finding yourself a
basic metallography book. Polishing is not difficult but takes a good deal
of practice and the right polishing equipment and technique. Copper alloys
used to be polished without a machine when I started work. I suppose ferrous
and other hard alloys were too in the beginning.
If you really only need to know how to etch the samples then if you tell us
what you want to etch I am sure someone on the list will know.
Peter
Peter Hutchison
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