On 10 May 2006 00:50:58 -0700, "Bookworm" wrote:

Wire cup brush on 9" angle grinder. Use a knotted cup brush to get rid
of heavy deposits.

Just polishes the rust. Gritblast to SA2.5 is only way to remove rust.

A wire brush on an angle grinder is a lot more effective than a slower
one on a drill. But use a good quality knotted brush, a thick apron and
a faceshield (not just goggles) or you get peppered.

Grit blasting is certainly the best, and the only practical way to get
into the corners - but a portable rig is messy and far from cheap to
hire. Even a larger "hobby" compressor would struggle with this sort of
work too.