Magnesium Chloride and Your Vehicle: What Colorado Drivers Need to Know
If you live in Grand County, magnesium chloride is simply part of vehicle ownership.
We encounter it on winter roads, and it may also be used for dust suppression on unpaved roads during the warmer months. That means exposure isn't necessarily limited to ski season.
The question I hear isn't usually whether magnesium chloride gets on a vehicle.
It's what should you do once it does?
The short answer: don't panic, but don't ignore it either.
Why Magnesium Chloride Is Used
Magnesium chloride is useful because of its ability to attract and retain moisture. On roads, that can help with ice control and can reduce airborne dust on unpaved surfaces.
Unfortunately, those same properties aren't particularly desirable once the material is covering your vehicle.
Road treatment can end up on lower body panels, wheels, wheel wells, suspension and underbody components. Drive behind another vehicle on a wet treated road and the amount of material thrown onto your vehicle can increase considerably.
And because the residue can remain on surfaces, waiting for it to simply disappear isn't a vehicle-care strategy I'd recommend.
Where Should You Be Looking?
The obvious answer is the paint, but that isn't the only place I look.
Pay particular attention to:
Lower doors and rocker areas
Front and rear bumpers
Wheels
Wheel wells
Behind mud flaps
Lower trim
Undercarriage and accessible suspension components
Those areas receive a tremendous amount of road spray.
Wheels deserve particular attention because you're dealing with road-treatment residue along with brake dust, heat and ordinary road grime.
Should You Wash Your Vehicle After Driving on Treated Roads?
Yes - and sooner is generally better than later.
That doesn't mean you need to panic every time you drive home on a treated road. But repeatedly allowing contamination to accumulate isn't doing your vehicle any favors.
Removing it regularly helps prevent layers of road grime from building up and gives you an opportunity to actually see what's happening to the surfaces underneath.
There's an important distinction here, though:
Removing contamination and restoring damage are two different things.
If a surface has already become stained, etched, oxidized, pitted or otherwise damaged, washing alone may not return it to its previous condition.
That's when we move from cleaning into restoration.
What About Ceramic Protection?
This is where expectations matter.
I like protective coatings because they provide a sacrificial layer between the environment and the surface we're trying to preserve. Depending on the product and application, protection can also make routine cleaning easier because contamination isn't interacting with an entirely unprotected surface.
But ceramic protection does not create an invisible force field around your vehicle.
You still need to maintain it.
Magnesium chloride, mineral deposits, road grime and other contamination should still be removed rather than allowed to sit indefinitely.
I would much rather maintain and eventually renew a protective layer than unnecessarily correct damaged factory paint.
Don't Forget the Glass and Wheels
Paint tends to receive most of the attention, but Colorado conditions affect more than paint.
Glass can develop mineral deposits and water spotting that become increasingly difficult to remove. Wheels are subjected to road contamination, brake dust and environmental exposure at the same time.
That's why I look at vehicle protection as a surface-by-surface decision.
Paint, glass, wheels, exterior trim and interior materials don't all need the same product or restoration method.
They need the appropriate one.
What If the Damage Has Already Happened?
That's when we evaluate before we start correcting.
Can the contamination be removed chemically?
Does the surface need mechanical decontamination?
Is polishing necessary?
Has the damage penetrated deeply enough that correction would require removing an unreasonable amount of material?
The answer isn't always to become more aggressive.
One of the most important things experience teaches you is when to stop removing material and change strategies.
Our goal at Grand Gloss Boss is to use the least aggressive effective method and preserve as much of the original surface as possible.
The Best Time to Deal With Magnesium Chloride
Before it becomes a restoration project.
Regular removal, proper maintenance and appropriate protection won't make a Colorado vehicle invincible, but they can make a significant difference in how well its surfaces age.
And that's ultimately what protection is about.
Not keeping a vehicle perfect.
Keeping today's contamination from becoming tomorrow's damage.
Book your ceramic coating protection HERE.
Grand Gloss Boss
Grand County's Vehicle & Vessel Restoration & Protection Specialists
📞 970-281-7821
About Grand Gloss Boss
Grand Gloss Boss is Grand County's Vehicle & Vessel Restoration & Protection Specialist, helping vehicle owners preserve the appearance, value, and longevity of their cars, trucks, RVs, boats, fleets, and specialty vehicles. Backed by more than 35 years of hands-on restoration and detailing experience, we specialize in paint correction, ceramic coatings, interior restoration, and long-term vehicle preservation throughout Grand County, Colorado.
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