My other bikes cannot easily accept fenders, so I picked up a $170 bike that will be updated for winter dry-road travel & 150 mile/week commuting that will begin again in March.
The bike is a 1987 Trek 400D Elance. Its a mid-level "sport/touring" model. It has a Reynolds 531 main triangle. It's a steel bike.
Disassemble the bike to clean and regrease the BB and headset.
Treat the frame with J.P. Weigle's bicycle frame saver rust inhibitor while disassembled.
Install full length fenders with a skirt at the bottom of the front fender to reduce spray.
Avoid the salt-bath by staying off wet and/or icy roads until March.
I'm assuming that the bike won't dissolve into powder.