Grob gelcoat

Greetings,

Historically, older German gelcoat has failed pretty spectacularly going
from a dry climate to a hot/humid gulf coast environment.

On the other hand, Grob gelcoats seem to hold up much better in general.
Many late 70's 102's still look pretty good.

Does anyone have any experience with a "dry to wet" climate change with
an older Grob (last 4-5 years)? I'm hoping that the Grob gelcoat is
much more immune to climate changes.

Thanks,

Gary