Yes, that's true, I forgot about that. But with metal there's a lot more there to begin with, at least. When I made that comment I was thinking of some of the exterior trim pieces on my "new" car (a '96) that had faded and become so brittle you could break them easily. It takes a little longer for metal to get that way. I think some manufacturers do use plastic coatings now-- I seem to remember reading about a plastic coating being applied to the underbodies of some cars as far back as '74 or so. But I don't know if even that stops everything. I think what I'd really like is some sort of way to "shrinkwrap" or seal your old Imperial with something that will preserve it for years to come . . . without just trapping corrosion in. Mark M Jim Gathmann wrote: > True.. but the finish on metal cars (paint) can be > just as damaged by pollution and such. Even worse in > the case of acid rain. > > Personally, I think the ultimate car would be a steel > body coated in plastic. No rust, 'cause the water > won't be able to get near the metal, yet as strong and > supportive as metal. Seems more realistic then > electric rust stoppers and inches of rubber > undercoating.