salt and peppered frame......
Salt, if remaining completly dry wont be too bad, but it is extremely suseptible to moisture. the 1st damp night or splash of rain and you will be able to hear it corroding. hence don't clean your bike with washing up liquid because the thickening agent is salt!
If your bike is salty, when cleaning you must get ALL the salt off in one go.
I smother my bike in wax and grease prior to the winter trip, it gets well caked, and then degrease and wash on return. It is surviving amazingly well on wet salty roads. (but it is a honda to be fair)
The most effective way of turning petrol into noise without the side-effect of horsepower