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Re: Holbrook slices
Jim Hurley wrote:
>
> Some of my slices (like Hamada du Draa) are quite young and yet
> show very early signs of rust. This one came from a desert, so maybe
> that is common, but for a fall only a few years old that seems bad.
> Has anyone tried to sand a slice with, say 600 grit silicon carbide
> paper? It should wipe out that oxidization and restore a nice finish.
>
> Jim Hurley
Jim,
Dense meteorites like Gao restore very nicely. I re-polished an end
piece by starting with 400 grit and working progressively down to a 1500
grit wet sand with methanol. I finished the surface with clear lacquer
and it looks spectacular.
Meteorites like Hamada are another story because the sanding dust is
difficult to remove from the pores. I have refinished Mt. Tazerzait
with great success but had a difficult time with Hamada. Vacuming and
rinsing will not neccessarily remove all the sanding dust. Submersion
in a sonicator bath filled with alcohol works great if you can get
access to a sonicator.
Ron Fiedler
References: