It's all over the roads all throughout the year, not just in winter. If you want to protect your bike from it then I can help as I am an AllYearBiker motorcycle anti-corrosion franchise owner.
Incase you are wondering, this is what you'll get for your readies:
Initial washdown

Degreasing, getting rid of the oily goo

Washing off the degreaser

Go ahead dirt, make my day!

Foam cleaner, taking off the lightweight filth and road traffic film

Another wash down, taking off the foam and the last of the dirt

Into the garage to be dried off

Masking off the tyres and brakes

Spraying on the magic jizz

High pressure mist gets into all the places you can't normally reach when applying it by hand

Final shine with our own PTFE wax

UPDATE: I am now able to do a mobile service where I come to you. See my last post in this thread for more details.