"Gunner Asch" wrote in message
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[...]

Ayup. It has little or no ability to remove burrs in anything hard. Add
a bit more Brasso..another table spoon and it will likely remove the
last bit of stains..which generally are etched into the material..just a
heads up. Might not be deep..but walnut hulls have little ability to
actually remove much metal.

The last batch I put in a) pieces that were in corn cob before and b) pieces
that I cleaned with Brasso by hand - some of them 3 times. The latter still
had stains on them. The nut shells did not remove them after 7+ hours (I did
not add Brasso to the shells on this occasion). I think you are right about
the etching. I shall look for some of the mild plastic media and see what
they can do.

The next batch I shall put some steel in the nut shells. What compound do
you use for steel? There is a ton of proprietary compounds out there. I
hear
some people just put in a bit of turtle wax. I run the silica with just
water and dish- washing liquid with the predictable result of good
cleaning
but flash rusting. I wonder if dumping in a bit of Evaporust would work.

Are you trying to deburr, destain or what? Walnut hulls are really not
much good for anything as hard as steel, other than for putting a nice
almost matt finish on it. Ceramics are what you need for steel.

What are you trying to do with the steel? Let us know and Im sure you
will have a lot of suggestions..some even good.


On this occasion I am purely trying to find out what the various media will
do to various pieces.
Eventually I would like to deburr/remove machine marks from steel. I
understand that ceramic media are pretty much the ticket but while I am
hunting for a cheap source of the ceramics I am playing with whatever is at
hand :-)

--
Michael Koblic,
Campbell River, BC