^ I believe you are correct, he has shown these photos before.

Thanks for the correction on "neutralize", not "negate". I was careless with my terms there.

I've never had a problem emptying my oxalic acid baths onto my lawn.

+1 Barkeeper's Friend. I use a lot of that. And I do scrub with it, either with a rag or a soft steel brush. It is non-abasive, and very effective.

I've left a rim in the oxalic acid bath too long, like a week, and found that a faint milky discoloration of the chrome occurred in a part of the rim. It appears to be a film, like unpolished wax, but no amount of polishing, scrubbing or more chemicals altered it.