Y,

I own two Cobra trailers -- one fiberglass topped, the other aluminum.
The fiberglass trailer is only 5 years old but is already dull and
oxydized (it spent two years in Colorado and two in Arizona). It needs
a day or two of work with a polisher and buffing compound. The aluminum
trailer is 2 years younger but still looks brand new after three years
in Arizona. Given a choice between the two, if I was ordering new, it
would be the aluminum.

-ted/2NO