If your paint still feels rough after washing, bonded contamination may be the reason. In this video, Bradley demonstrates a complete car decontamination process, from deep-cleaning the wheels to combining iron removal with clay treatment before drying and moving on to polishing or protection.
Watch the full car decontamination walkthrough.
What Decontamination Removes That Washing Leaves Behind
A regular wash removes loose dirt and much of the road film on a vehicle. Decontamination addresses deposits that remain attached after that wash. Iron particles and other bonded material can leave the paint feeling rough even when it looks clean.
Bradley demonstrates the process on a Porsche before polishing and protection. Your vehicle may need only part of that routine. Assess the clean surface and choose the least aggressive process that resolves the contamination rather than automatically claying every time you wash.
Decontamination is also different from defect correction. Removing attached contamination can improve smoothness, but it does not polish out scratches or repair etching. Decide whether the next step is routine protection, paint correction, or coating preparation before choosing your drying and finishing products.
Start with Separate Wheel and Tire Tools
Rinse loose dirt from the wheels, tires, and wheel wells. Bradley uses CLEAN APC for compatible wheel-well surfaces, Wheel Cleaner for wheel contamination, and Tire Cleaner for browning and old dressing. Choose products according to the finish and brake system, and keep all wheel tools separate from paint tools.
Clean the barrels, faces, spoke edges, and tires with suitable brushes or mitts, keeping the chemicals wet until the thorough rinse. Wheel Cleaner is not the default choice for carbon ceramic brake systems; see our carbon ceramic brake cleaning guide for that situation.
The depth of wheel cleaning in this video suits the upcoming coating installation. A maintenance wash may not require the same level of preparation, especially if the wheels are already protected and only lightly soiled.
Deep Clean the Body Before Claying
Bradley uses Decon Soap in the foam cannon and bucket. This stronger shampoo helps loosen grime and traffic film. On a dirtier vehicle, foam the body, let the product work within its directions, and rinse before the contact wash.
Follow with a clean wash mitt and a methodical top-to-bottom wash. Use light pressure and clean the media frequently. Leave rockers, the lower doors, and heavily contaminated bumpers until last. Rinse thoroughly so loose abrasive dirt does not become trapped between the clay and paint.
Work on cool surfaces out of direct sunlight and never let chemicals dry. Shorten your sections in hot or windy weather. A fixed whole-car sequence that works inside the studio may need to become a panel-by-panel process outside.
Chemical and Mechanical Decontamination Have Different Jobs
| Step | Primary purpose | Key limitation |
|---|---|---|
| Decon Soap wash | Deep cleaning of grime and road film | Does not replace every targeted contamination treatment |
| IRON fallout removal | Targets ferrous contamination | A purple reaction does not prove every type of contamination is gone |
| Clay or synthetic clay | Mechanically removes remaining bonded surface material | Can mar paint and affect existing protection |
| Polishing, if needed | Corrects appropriate paint defects | A separate process that removes material rather than simply cleaning |
Use IRON on a Clean, Cool Surface
IRON Fallout Remover reacts with ferrous deposits that normal washing can leave behind. Apply according to its current directions and allow the specified dwell while monitoring the surface. Keep it away from incompatible materials, pay attention to uncoated metals, and rinse before it dries.
Some areas may show more purple reaction than others. Use that as feedback about iron contamination, not as a reason to keep spraying indefinitely. Different deposits need different treatments, and a surface can still feel rough after the iron-removal stage.
Clay Only Where the Surface Needs It
The video compares traditional clay with synthetic tools such as the Armour Clay Block. Both need ample, compatible lubrication and a clean working face. Bradley favors synthetic media for convenient maintenance, while traditional clay can be useful for heavier contamination.
Test a small area first, especially on soft or dark paint. Move the media gently across a small lubricated section, reapply lubrication as needed, and inspect your results. If the tool drags or catches, stop and add lubrication rather than increasing pressure. Rinse synthetic media frequently so collected contamination does not stay against the paint.
Bradley demonstrates Armour IRON with compatible synthetic clay, plus a method using a light layer of Decon Soap foam over the applied IRON for lubrication and working time. These are specific combinations shown with these products. Do not assume other cleaners can be mixed or used as clay lubricant; the Clay Block directions specifically advise against bug remover as clay lube.
If you prefer a separate wash, iron removal, rinse, and clay sequence, keep each stage controlled and follow each product's instructions. Our clay bar versus synthetic clay guide explains tool selection and handling in more detail.
Rinse, Inspect, and Prepare for Protection
Rinse away all chemical and clay residue, then dry with clean microfiber. Check the clean paint for smoothness and inspect it under useful lighting for marring. Stop claying once the intended contamination is removed; extra passes add contact without necessarily improving the finish.
If you will polish and ceramic coat, choose a drying process that fits those next steps and complete the required final surface preparation. Do not treat a gloss spray as a substitute for Panel Prep. If you are finishing without polishing, select compatible protection and follow its application instructions.
Our Decontamination Package groups the core products for this process. Use the guide to decide which stages your car actually needs rather than assuming every product must be used at maximum strength.
Decontamination Questions
Should I clay a ceramic coating regularly?
Not automatically. Clay is mechanical abrasion and can affect protection. Start with suitable cleaning and targeted chemical treatment, then assess whether mechanical removal is necessary.
Will decontamination remove water spot etching?
It can remove surface deposits with the appropriate products, but etched damage is a different issue. Our mineral reset guide explains that distinction.
What if the paint still feels rough?
Inspect the remaining contamination and confirm product compatibility before escalating. Repeated aggressive claying is not a universal solution for every rough spot.