> Aluminum forms an relatively tenacious oxide layer on the surface,
> without which it is extremely reactive

It is, but I'm sure you could could quite easily find aluminium where
the anodising has broken down, resulting in a powdery surface. I
have several examples here, which do not compare well with examples
that have a baked ceramic coating

> never been obvuous to me that :Coke dissolves xxx" is an expecially
> good indicator of its dangerousness as a drink. YMMV :-).

But would you drink Coke that has been used to clean a coin ? That's
the point

Joe
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