Originally Posted by
Matas
An import S15 won't have been under sealed and will probably have some surface rust at least which will all need to be stripped back and to underseal properly you'll want as much of the underside disassembled as possible which can be a big job. I would advise on doing this regardless of it being used in winter or not. But overall if it's your precious dream car, having sat parked up even on the driveway is better than driven through salty shity roads. Subsequent welding repairs are costly and often not done properly.
TLDR: Somehow make a winter shitbox work somehow, these things rust like hell and you'll regret it