On my ride, there is some rust lurking on the rockers around the rear jack plugs. But then again it has lived all of its life in NY with nice salty roads in the winters.
If your car started out in LA, it probably wont be a factor.
'84 190E 2.3
'83 Porsche 944 (track car)
'84 Porsche 944 (parts car)
85.5 Porsche 944 (sled)