but what kind of goop came off in it when it was used for stripping parts?
Iron, and the stuff you were going to scrape off anyways. Once neutralized, no big deal.
Maybe, although the neutralizing itself does little to remove potential heavy metal toxicity, and technically, its far from legal to dump or dispose of haphazardly of any of the waste product.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
