Winter Prep: Protecting Your Paint from Road Grime and De-Icer on Pass Trips
By Jaisen Ostrom
Hey! It's that time of year again. The rain is back, the leaves are coming down, and pretty soon a lot of us on the Eastside will be heading up I-90 for ski weekends, cabin trips, or just a drive to see some snow. I love those trips, but I also see what they do to cars afterward.
The short version: the stuff that keeps the pass drivable in winter is rough on your paint, wheels, and underside. The good news is that a little prep now and a quick routine after each trip goes a long way. Here's what I tell people.
Why winter driving is hard on your car
De-icer and road treatment
When roads get icy, crews treat them so we can all get over the mountains safely. That's a good thing! But that treatment, mixed with water and road dirt, ends up sprayed all over your lower panels, wheels, and undercarriage. If it sits there for weeks, it can work on clear coat, trim, and exposed metal.
Road grime and film
Even on a regular rainy commute on I-405 or SR-520, you pick up a gray, oily film. In winter it builds faster. That film dulls the paint, smears across your windshield, and makes the car harder to clean the longer you wait.
Less washing, more buildup
Honestly, most people just wash less when it's cold and dark out. I get it. But winter is when your paint actually needs protection the most, because it's getting hit with the most.
What to do before winter hits
Get some protection on the paint
The biggest thing you can do is make sure there's a layer between your clear coat and the road. Couple of different options:
Wax or sealant. This is what my Level 1 detail includes. It gives the paint a slick layer that helps grime rinse off, but it only lasts a few months, so it needs re-upping.
1-year ceramic coating. My Level 2 detail adds a 1-step polish and a 1-year ceramic coating, plus rain repellent on the windows and sap and tar removal. That's a nice fit if you want to get through a full winter without thinking about it.
Full ceramic coating. My Level 3 Ceramic detail is a 3-step cut, compound, and polish, then a ceramic coating with 3 to 5 years of protection. The coating goes on almost every surface: paint, plastics, glass, headlights.
You can see all of it on my pricing page. If you're on the fence about coatings, I wrote a whole post on whether ceramic coating is worth it in the Pacific Northwest.
Do a quick paint test
Not sure if your current protection is still working? A good test is to spray some water on the paint and see if it makes tight beads. If the water just sheets out flat and sits there, the protection is mostly gone and it's a good time to put something fresh on before the snow trips start.
Don't forget the glass
Visibility on the pass at night in the rain is no joke. Clean glass inside and out, fresh wiper blades, and a rain repellent on the windshield make a real difference. Rain repellent is part of my Level 2 detail, but even a good DIY clean helps a lot.
Check the interior too
Winter trips mean wet boots, snow melt, and sand on the floor. All-weather mats are worth it. If your carpets are already looking tired, getting them shampooed before the season starts means you're not trapping more moisture and dirt on top of what's already there.
What to do after every mountain trip
This is the part people skip, and it's the part that matters most.
Rinse within a few days
You don't need a full detail after every trip. What you want is to get that road treatment off before it sits. A rinse or wash within a few days of coming back down is ideal. Focus on:
Lower doors and rocker panels
Behind the wheels and inside the wheel wells
The wheels themselves
The front bumper and grille
Use a touchless or gentle wash
If you're washing at home, use a pressure rinse first to knock off the heavy grit before you touch the paint with a mitt. Rubbing gritty film around is how swirls happen. If you're going through a car wash, a touchless one is easier on the paint.
Shake out the mats
Pull the mats, let them dry, and vacuum up any sand. Leaving wet mats in all week is how you end up with that musty smell and foggy windows.
How often should you get a detail in winter?
It depends on how much you drive and how much protection you have on the car. If you're running wax or sealant, I'd plan on a maintenance detail every few months so there's always something on the paint. If you've got a ceramic coating, you can mostly stick to regular washes, and the car stays way easier to clean, which is honestly the best part in a wet winter.
Either way, a detail in late fall before the trips start, and another one in spring to clean up after, is a really good rhythm for Eastside drivers. If you want the full fall list, check out my fall car care checklist.
I come to you
Exhibit Auto Detailing is fully mobile, so I come to your driveway or office anywhere around Kirkland, Bellevue, Redmond, Sammamish, Issaquah, North Bend, Snoqualmie, and the rest of the Eastside. No need to drive anywhere in the rain.
If you want to get your car ready before the first pass trip, here's my booking link: calendly.com/exhibitautodetailing. If it's easier, feel free to call or text me at 206-963-7984, or email info@exhibitautodetailing.com. Happy to help, and whatever works best for you!
Jaisen Ostrom Exhibit Auto Detailing