On Thu, 20 Dec 2007 01:19:31 -0800 (PST),
" wrote:

You say confined space? in which to work,
dry sanding and cutting IS a health /lung risk.
youll need to use a proper cuff type micron dust filter respirator,
or install proper vacumn dust extraction.
Otherwise you will pay dearly with your health.
Do this properly!!

Yes, I hear you. I only use a paper painter's mask. Since I do this
only a day or two a month, I figure I won't kill myself, but I would
like to reduce the dust.

Look in woodworking catalogs for dust extraction gear. Use standard
foil flex or knockdown metal dryer duct for the collection system, 3"
or 4", and you can use standard air conditioning tee-Y's and register
boxes behind the grinder to get the airflow going that way.

Do NOT use plastic pipe for dust collection unless it's designed for
the use (semiconductive static dissipative agents built in) - air
moving at high velocity creates static electricity, and some metal
dusts are flammable or otherwise reactive, especially when mixed.
(Aluminum dust plus steel dust = Thermite.)

Bad things happen inside the dust collector, or at the corners of
the piping, and then the fire melts right through the plastic, or all
the static built up in the pipes discharges inside the cloth collector
bag...

You need a vibrating tumbler.

That's an idea, but I'm not sure I want to polish the threads.
Wrapping/plugging them before tumbling would likely cancel out the
labor savings of tumbling, and I still have to do a lot of shaping
before the parts could go into the tumbler!

What are the threads on the capo arms? If it's a standard thread,
you can buy socket head set-screws and spin them into the bodies with
a tee wrench in a few seconds each, then toss in the vibratory
tumbler. For the arms, there are standard sizes of dip-molded vinyl
sleeves that can slide on over the threads, to keep them from getting
dulled in the tumbler. And they both should be reusable hundreds of
times.

And nobody I know has an extension on their bass, and there are a
few. Darn. Unless I should talk them into doing it...

-- Bruce --