Paint preparation
Paint Decontamination.
The step that removes what a regular wash can't, before any polishing or protection work.
Starting at
Included in pre-polishing or pre-ceramic preparation packages
Exact price depends on the level of contamination found during evaluation.
Typical duration
Usually included in a preparation visit, before polishing or protection.
Where
9250 boul. Leduc, Quartier DIX30, Brossard — by appointment
Paint decontamination targets contaminants that stay stuck to the surface after a regular wash: ferrous particles from brake dust, industrial fallout, road tar, tree sap and hard-water stains caused by calcium. These contaminants don't come off with soap; they need to be dissolved or mechanically removed.
In Quebec, exposure to road salt and calcium through the winter makes this step particularly relevant once or twice a year, generally in spring and fall, before any polishing or ceramic coating.
Which contaminants are targeted?
Ferrous particles mostly come from brake dust and metal particles suspended near heavily travelled roads like the A-30. They oxidize on contact with moisture and leave small orange specks on the paint, especially visible on lighter colours.
Road tar and tree sap stick to the surface and resist regular soap. Hard-water stains, caused by calcium in water drying on the body, leave mineral rings that, left too long, can slightly etch the clear coat.
- Ferrous particles (brake dust, metallic fallout)
- Industrial fallout and airborne pollution
- Road tar
- Tree sap
- Hard-water spots and calcium deposits
The plastic bag test
A simple way to check whether a vehicle needs decontamination is the plastic bag test: a hand wrapped in a clean plastic bag glides over the washed and dried paint. If the surface feels rough or gritty instead of perfectly smooth, contaminants are still present despite the wash.
This test confirms what many owners sense without being able to explain it: paint that "never looks as glossy as before," even after a good wash.
Clay bar or chemical decontamination?
A clay bar removes contaminants through gentle abrasion: it lifts particles embedded on the paint's surface with the help of a lubricant. It's effective, but it does involve light mechanical contact with the paint.
Chemical decontamination uses targeted products, including an iron remover that changes colour on contact with metallic deposits and a tar remover for sticky residue. These products dissolve contaminants without friction, reducing the risk of marking already fragile paint. In practice, both methods are often combined depending on the vehicle's condition.
Why it's a mandatory step before polishing or protection
Polishing contaminated paint means dragging hard particles under the pad, which can create new micro-scratches instead of removing existing ones. Decontamination removes that risk by clearing particles before any abrasive contact.
Before applying a ceramic coating or liquid PPF, perfectly decontaminated paint is also essential for proper adhesion. A contaminant trapped under the protective layer stays visible and active for the entire length of the treatment, sometimes several years.
Recommended frequency in Quebec
Given the exposure to salt, calcium and industrial fallout typical of Montreal's South Shore, decontaminating once or twice a year is generally enough for a normally used vehicle: ideally in spring, after the road-salt season, and in fall before winter.
A vehicle that logs a lot of highway kilometres or stays parked outdoors year-round can benefit from more frequent decontamination, especially before a planned polishing or ceramic coating appointment.
How it works
Step 1
Surface test
Touch check to confirm the presence of contaminants.
Step 2
Pre-wash
Removal of surface dirt before targeted treatment.
Step 3
Chemical treatment
Iron remover and tar remover applied depending on the affected zones.
Step 4
Mechanical decontamination
Clay bar pass if needed, with lubricant.
Step 5
Rinse and inspection
Full rinse and a new surface test to confirm the result.
Recommended aftercare
- Avoid automatic brush washes, which redeposit abrasive particles.
- Hand wash with mild products in the weeks after treatment.
- Plan decontamination once or twice a year, ideally spring and fall.
- Schedule polishing or protection shortly after to make the most of the clean surface.
What our clients say
★★★★★
“Amazing job by Carl and his employee! Great price too, and the attention to detail is the best I ever witnessed. Back next year with both my cars. Ceramic 1 year on brand new Nissan Ariya.”
★★★★★
“Excellent service! I had concrete and milk stains baked into the doors and roof of my car and everything was perfectly cleaned. The work was done with great care, even beyond what the service included. I recommend them 100%.”
Frequently asked questions
- How do I know if my vehicle needs decontamination?
- The plastic bag test is the simplest way: if washed paint feels rough through the bag, contaminants are still present and decontamination is recommended.
- What's the difference between a clay bar and chemical decontamination?
- A clay bar removes contaminants through gentle abrasive contact, while chemical decontamination dissolves them with targeted products. The two methods are often combined depending on the paint's condition.
- Why is decontamination mandatory before polishing?
- Because polishing contaminated paint drags hard particles under the pad, risking new scratches instead of removing existing ones.
- How often should a vehicle be decontaminated in Quebec?
- Once or twice a year is generally enough, ideally in spring after salt season and in fall before winter.
- Does decontamination remove hard-water spots from calcium?
- Yes, calcium deposits and hard-water rings are among the targeted contaminants, treated with a combination of chemical products and, if needed, light localized polishing.
- Is it necessary before a ceramic coating?
- Yes, it's a mandatory step. A contaminant trapped under the coating stays visible and active for the entire treatment, sometimes for years.
- Where can I get my vehicle decontaminated near Brossard?
- Chic Lave-Auto Eco Car Wash offers this service at 9250 boulevard Leduc, Quartier DIX30, level SS2-A, in Brossard, by appointment Monday to Saturday.
Related services
Paint Correction
Removing swirl marks and micro-scratches before any protective coating goes on.
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Car Polishing
Restoring depth and gloss to paint, from light maintenance to full correction.
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Ceramic Coating 3-Year
A semi-permanent protective layer lasting 3 years, hydrophobic and UV-resistant.
Learn more →
Ready to protect your vehicle?
All evaluations are done on-site, by appointment, at Quartier DIX30.