On Fri, 2 Jan 2004 07:38:53 -0500, "Larry Smith"
wrote:

I'm using DuPont's Aluminum Conversion but it doesn't work as well as some
I've seen. I want a little better etch. Also it is too expensive. Who
has a better source? The old literature speaks of a powder form chromic
acid etch. Anybody know where to find it at a good price? Thanks.

the standard alodine etch is a dilute phosphoric acid.
dont know what else is in the mix to moderate its action though.
Stealth Pilot