Salt is the problem.
I've got a Harley, and the bike was out only at one day where I drive about 100 or 200meteres at a salted road
in front of a car wash.
At home I give her a quick clean and than I leave her in the garage.
The fork is built of high quality polished alloy, some parts with clear coulour, some natural. After a few days I think, it would be good to have a second look. Real unhappy. All over white crisps caused by the salt, still under the colour.
I do my best, it isn't cured.
How aggressive salt works you can see often at Moutainbikes or Mmotorcycles which are used the full year, this bikes are most built with a lot of alluminum stuff, a look at such bikes isn't fun.
On a car you must think about if you drive on a (still a few days ago) salted road you drive in a dry or wet cloud of saltdust,
and dust (ask your wife) turns in every space.
René
