Winter Cleaning?
 

For those that are driving there FRS or BRZ in winter, how often are you going to clean your car?

Also, my more important question, how would you clean the under body. Whenever I'm at a touchless car wash i can never get a good clean underneath.

Any tips or suggestions? Aside from going to the shell gas station and getting it washed there.

There is a touchless wash here locally for 13.00 it does a full undercarriage spray with the premium wash. I figure I will do it each time the weather dries up?

Weve got a great touchless by us which does a double pass in the winter, and all their washes are $5 year round. I've had some older Hondas that I've gotten from the west coast and drove through some WI winters. My schedule with them was always either weekly, or after the roads had dried after a hard snow. I never saw any rust creep on those.

I would also take off the fender edge covers (which we don't have), and mudflaps (I used 3m in those areas).

I plan on keeping the same schedule with this car (minus the rust spray), just make sure you also clean out the trunk sill, hood sill, and door sill area with each washing.

Also, for reference:

Rust Perforation Limited Warranty:

RUST PERFORATION COVERAGE for all models is 5 years, regardless of mileage. Subject to the exclusions listed in this warranty, defective original body sheet metal panels that are rusted completely through from the inside out (perforated by corrosion) will be repaired or, at the option of SOA or your Authorized SUBARU Dealer, replaced without charge to you for labor and materials. The following items are not covered: (1) rusting of the outside of the underbody (floor pan) or any other part of the vehicle except body panels; (2) rust resulting from alteration of any body panels; (3) rust as a result of damage to paint caused by normal road hazards such as stones or other debris; (4) body panel rust caused by abuse, lack of maintenance, or damage to the vehicle; (5) rust caused by sand, mud, salt, submergence of a body panel in water, exposure to industrial fallout, chemical fallout, tree sap, hail, or other causes beyond the control of SOA; (6) replacement body sheet metal panels and (7) other items listed under "What is Not Covered" (later in this section).
Rust Perforation Coverage applies to perforation due to corrosion only. Perforation is a rust-through condition, such as an actual hole in a sheet metal panel. Cosmetic or surface corrosion, such as that caused by stone chips or scratches in the paint, is not covered under this warranty. In addition, SOA or your Authorized SUBARU Dealer reserves the right to decide whether painting the repaired or replaced panel to match the original finish is feasible. SOA will not, under any circumstances, pay for painting the entire vehicle solely to match paint color.
Since your vehicle was designed and built to resist corrosion, use of additional rust-inhibiting materials is not necessary and not a requirement for coverage under this warranty. Whether to obtain such additional protection is your decision.