"Airy R. Bean" wrote in message
...
Assuming that one could obtain a slab of marble for the
base of a home grown bug key, is it an easy thing to
polish and to drill?

Does one use ordinary masonry drills?

Any undertakers out there?


An ordinary masonry drill is perfect.It goes through it like cheese. The
material is basically quite soft and can be easily shaped with an angle
grinder and a cheap diamond cutting disc (those for cutting bricks, flags
etc) . For final levelling use various grades of car 'wet-n-dry' (Silicon
Carbide paper) and finish using Silicon Carbide (or even diamond!) 'lapping
paste' slurries.
(nb. for rust stains soak in oxalic acid)
regards
john