Posted by Kai on February 18, 2010 at 17:44:03:
In Reply to: AL-6XN Etchant posted by Ryan on February 08, 2010 at 17:55:29:
Visit Allegheny website and search for AL-6XN Sourcebook. It has information about etching.
10% oxalic for sigma phase and 15-10-10 for general use.