On Mon, 01 Sep 2008 07:26:35 -0400, Michael Horowitz
wrote:

On Sun, 31 Aug 2008 23:49:43 -0400, Ernest Christley
wrote:

mhorowit wrote:
Besides abrasive blasting, or sanding, how do you remove the black
scale from factory/Spruce fresh tubing? - Mike

I've been told that you don't, and I didn't. Just give it a rough
sanding to improve paint adhesion and paint it.

I like that - Mike

michael you should never abrasive blast aircraft parts.
you bead blast them. the difference is that "beads" are round and
produce a compressed surface which is resistant to fatigue failure.
grit blasting uses sharp edged particles that can leave millions of
sharp stress raising dents which may reduce the fatigue life.

Stealth Pilot