Interesting about Steve's comment of the Silica content in Wrought Iron. One thing I've noticed is that during an agressive etch small inclusions in the WR actually appear to "Sparkle". I'm wondering if that is the Silica.

Sure, I'd volunteer for finishing the test pieces. I'll be starting another run in a few weeks.

Regards
Ken

Last edited by Ken61; 04/25/16 12:13 PM.
I prefer wood to plastic, leather to nylon, waxed cotton to Gore-Tex, and split bamboo to graphite.