Chicago here. FR-S is my daily driver too. Clean car with dish soap (to remove all sealant). Thorough rub-down with Klasse AIO, then Klasse HSG. A couple days later I give it a wipe down and put on another coat of HSG.

Klasse looks fantastic with Whiteout, I've heard it's harder to make bring out a deep shine for darker colors. You can use AIO on your windows too, it beads water almost as good as Rain-X but lasts longer.

To keep it clean: if you have a garage, get a bottle of ONR, 10-15 thick towels, and a bucket. Fill it with hot water and use the GDWM.

Lmao this thread should be changed from winterizing to preparing for rain.

Rust proof, 17" studded winters, mud flaps, weathertech mats, opticoat, thickest damn wax I can find to protect from salt.

... For anyone dding there car through a real winter :)