There is a lot of salt in the air here where I live (Dubrovnik, Croatia), especially when a wind from the south is blowing called Jugo (Yugo, as the infamous car
).
Don't have a garage, so my scoot is outside in the weather all the time.
Most of the exposed metal part stared rusting pretty soon after I bought my scoot, and it's only gonna get worse. I spray everything I can from time to time with WD40.
If you like your scoot to look like new all the time, this won't be the best solution, because the film of WD40 that you spray on a attracts dust and grime, but I don't have a problem with that.
A picture of my left rear shock from last year (don't have any newer, or close up pictures)
Front disk (picture also from last year, looks worse now)