re:soda blasting

[Calvin Krug <ckrug@laf.cioe.com>]

OK, here's the question-  Why would the soda blasting residue be a problem
on aluminum?  It's water soluble.  Oh, and the soda used for blast media
looks like white sand, not like the stuff you find in a grocery store.
Unlike most media, however, soda disintegrates on impact, so it's a one
shot product.

Calvin Krug