At 02:28 AM 1/4/2007, Nathaniel Poole wrote...
>Professional preservationists almost never apply any kind of
>impermeable
>coating to a surface they want to preserve - for this very reason.

Odd, since other than a DeLorean, I've never seen a car without an
impermeable coating, unless it's been temporarily removed with the
intent of repainting it. Professional preservationists typically have
the luxury of keeping their items in climate controlled environments,
but even so, every car at Greenfield Village and in the Harrah
collection is covered with an impermeable coating.