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RE: Who knew working with acid could be fun? (Acid etching a knife.)
take the utmost care not to breathe any fumes while doing this!
On a job long time ago I had to clean metal with acid based products ( pickling and passivating) and at one point my lungs started hurting when I was so dumb to use it indoors without ventilation or respirator mask... never again!
Yeah, I should have mentioned that in the post, but I didn't know how in depth I should go with the process since I didn't wanna drag it on too long. The ferric chloride I use doesn't produce many fumes thankfully, where a paper mask or leaving a window open is enough to handle that aspect. The only thing that sucks about ferric chloride is when you go to neutralize the acid it basically acts like a volcano and can create a huge god damn mess.
ferric chloride is actually not an acid but reacts with water or water vapor and forms hydrogen chloride
https://en.wikipedia.org/wiki/Iron(III)_chloride
would battery acid work? but that might be too diluted to work...
Those products I talked about were based on nitric acid... you can make Aluminum as white as a sheet with that stuff