Road crews salt Metro Vancouver's highways and bridges through the wet season, and that salt ends up on your car whether you notice it or not. Here's what it actually does to paint, and what protects against it.
Road salt itself is corrosive, and left sitting on paint, trim, and especially the underbody, it speeds up rust and dulls the clear coat. Washing it off regularly through the winter, rather than waiting until spring, is the simplest way to limit the damage.
Salt is hygroscopic, it pulls moisture out of the air, which keeps the road spray on your car wetter for longer than plain rainwater would. That extra moisture accelerates oxidation on any exposed metal, wheel wells, undercarriage, exhaust components, and works into small chips or scratches in the paint faster than it would otherwise. On the visible clear coat, repeated salt exposure without washing contributes to the same swirling and dulling that any accumulated road grime does, just faster.
Metro Vancouver doesn't get the deep snow some other Canadian cities do, but the region's highways, bridges, and hills still get salted through freezing and near-freezing stretches, and the near-constant winter rain keeps that salt in solution and moving rather than drying off. The North Shore in particular sees more rainfall than the rest of the region because of the mountains, which means more salt spray staying wet on the car for longer. Flatter, low-lying areas like Richmond have their own version of the problem, standing water that doesn't drain as quickly.
The most effective thing you can do is not let salt sit, regular washing through the winter matters more than any single product. Beyond that, a hydrophobic barrier makes a real difference: our ceramic coating repels water, salt, and grime so less of it bonds to the paint in the first place, and a full exterior detail's 3-month ceramic sealant offers a shorter-term version of the same protection. Underbody and wheel well areas benefit most from a proper wash rather than a coating, since that's where salt sits longest.
For the wet, salted months specifically, ask about our Coastal/Winter Salt Protection add-on ($125, seasonal) — a targeted layer of protection for the areas that take the worst of BC's road salt and coastal spray. Book online or call 604-750-4635 to add it to your next visit.
Not every single time, but going a full winter without a wash lets salt residue sit far longer than it should. Every few weeks is a reasonable baseline.
It reduces how much salt and grime bond to the coated surfaces, but it doesn't replace washing entirely, especially for the undercarriage and wheel wells, which aren't coated.
They cause different kinds of damage, salt accelerates corrosion, UV fades and dries out paint and trim over time. Both matter, and a coating helps with both.
A detail right after winter clears out accumulated salt and grit before it's had all season to sit. See how often to detail your car for the full schedule.