[VAC] Re: Acid washing

[Toby Folwick <toby_folwick@xxxxxxxxx>]

in 1959 I think the alclad was there to protect the
aluminum alloy - or at least that's why they were
using it.  by the late 60's Airstream changed the type
of aluminum they were using on their trailers -
probably because alclad was not necessary, and likely
because the newer "refined" alloys that RJ mentioned
were significantly cheaper to use.

Toby