I received the MSDS sheet via an email directly from Picklex-20. The active ingredient is phosphoric acid. No big secrets here.
I do not intend ( or want ) to end arguments about best procedures for preparing metal and epoxy primers. Thus far this has not gotten out of hand and all that's been shared is sensible. I hope it stays that way.
My situation demands that I add a protective coating against flash rust. I will honestly share any failure or success as I proceed with this project so that others can learn. In the end, I hope it works out ok.
I have thought through things, made decisions, (although controversial to some) and will ALWAYS appreciate the advice of those willing to help me.