I tend to save stuff up and dump them in in one go. outside on a still-ish day great big rubber gauntlets and goggles. it is very very dilute though, so probably a bit less risky. Re-enamelling is always a bit nerve-wracking, especially if stuff has been lead soldered, but sometimes the pay off is well worth it.
I think I remember that episode. bit of artistic license in it I think!
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