I hate to buy a beater on top of it! But I just hate to use my loved babies.
i wouldn't buy a beater. properly maintained i think you can stave off the rust on yours. if you get a beater you'll want it to be a non-rust belt variety anyway so it doesn't test your resolve with rusty fasteners, drilling, torching, and welding. complete waste of time - spend that time maintaining yours properly. if you do get a beater, find one with no rust.
rinse often (kind of hard when it's butt cold, damp, humid, windy, and miserable for a month though!).
i would clean them well and have one dedicated for snow service. wash up under the wheel wells/fenders and make sure you don't have debris up under there. sticks, leaves, etc cram up in there and hold water/salt up against the metal. clean it all out.
the rear quarters rust in the same place all the time from the inside of the fender well - properly treat that somehow, i'm sure some brilliant folks here with body/paint work will point the way if asked. that would be a great thread to read. let's start one. i've got 4 legacy's with that rust right now (as new as 2002 and 2003).
I wonder why the Imprezas rust faster?
i think impreza's are generally less cared for because they were cheaper cars and lower end models in general.
I can see the perception though - but I don't think it's necessarily true..or I woudln't say it like that. "correlation does not mean causation" comes to mind. due to rust and unavailability of old stuff, the market doesn't support or hold on to cars nearly as long. old 80's stuff is junk out here, they've all rusted away so they appear archaic to a majority of people. i see some impreza's owned by folks who really wish they were STi's and drive them/treat them as such. you can find them chrome clad and winged up on craigslist. i think some of those things may add to the perception.
but - i also have a bunch of legacy's right now with severe rust in the quarter panels, so they are easily prone to it as well. 4 to be exact, 95, 96, 2002, 2003.
Question....is it pretty safe to drive in the winter on dry roads, or does the salt linger for some time after a storm? I understand that wet roads reconstitute the salt and cycle starts all over again, but how long does it take for the roads to "washoff" and the salt be rinsed way off the road?
it's fairly safe - the water "delivers" it to the road. it washes off fairly quickly but this also depends on a lot of factors - even down to how the locals use salt. some salt heavier than others. if you live close to a government building with critical operations or hospital they care about or a ski resort you'll see more salt than back country road hill billy country.
doesn't take long to wash off in general, it's very obvious and "white" on the roads in areas that salt heavily.