I have never used it personally, but I took a delicate piece to a commercial
blaster who used BAKING SODA on it. Did a fine job with no damage.
-----Original Message-----
From: shop-talk-bounces@autox.team.net
[mailto:shop-talk-bounces@autox.team.net] On Behalf Of Karl Vacek
Sent: Friday, May 01, 2009 10:39 AM
To: shop-talk@autox.team.net
Subject: [Shop-talk] Blasting media
Though I planned to make a mobile stand and water filter first, I just
couldn't wait to try my HF cabinet. It IS a religious experience to have a
blast cabinet !!
I bought HF-s genuine Chinese imitation glass beads - one grade fits all.
They work OK, but are the beads really supposed to be microscopic bits of
glass dust ? ISTR that in the cabinet at work many years ago they were
recognizably beads, and not that microscopic - as in they were at least
large enough that you could see that they were mostly round.
What sort of media have you guys been using most successfully for general
paint and rust removal ?
I also want to try walnut shells - for aluminum or soft things (like carb
bodies) and anything where tiny grit means later failure. They sell 12 and
24 grit - do I get the larger and wait till it becomes smaller, or what's
the strategy ? And are there any tricks to purging all the grit from the
cabinet before switching to walnut shells, corn cobs, etc. ? Do you perhaps
clean it well, and then put in some of the soft media and spray it around to
entrain all the hard stuff, then discard that and clean the cabinet again
before refilling and using it ?? Or isn't it that critical ??
Thanks !
Karl
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