Your paint is full of metal

What is iron fallout on car paint?

Iron fallout is microscopic hot metal particles — mostly brake dust, plus industrial and rail dust — that land on paint and embed themselves in the clear coat, where they rust in place and show up as tiny orange specks.

They are not sitting on the surface. The particles arrive hot off a brake rotor or a rail car, land on the paint and bed into the clear. Once they are in, they hold moisture and corrode, and because rust takes up more room than the metal it came from, each speck slowly pushes outward into the clear coat around it.

White and silver vehicles show it first and worst, which is why the problem usually gets noticed on a white truck. On dark paint it is doing exactly the same thing, you simply cannot see the orange.

How do I know if my paint is contaminated?

Wash the car, then put your hand inside a thin plastic sandwich bag and run it lightly across the paint — if it feels gritty or bumpy rather than glass-smooth, the paint is contaminated and needs decontaminating.

This is the real test, and it costs nothing. The bag amplifies what your fingertips cannot feel directly. Clean, decontaminated paint feels like glass. Contaminated paint feels like fine sandpaper, and the roughness is worst on the hood, roof and the lower third of the doors.

Do it on a washed car, not a dirty one. Anything you feel after a proper wash is bonded to the paint rather than lying on it, which is the whole point.

What is the purple stuff that runs off the car?

The purple is the chemical iron remover reacting with embedded iron particles and dissolving them — the product is colourless when it goes on, and it turns purple-red only where it finds iron, so the colour is the reaction, not a dye.

It is the most useful diagnostic in detailing because it shows you exactly where the contamination is. A vehicle that runs clear has little iron in the paint. One that bleeds purple down the doors and streams red out of the wheels has a great deal, and you can watch it appear in real time.

It is also why we photograph this step. Most customers have no idea their paint is full of iron until they see what comes out of it.

Do I need decontamination before a ceramic coating?

Yes, and it is not optional — a coating bonds to whatever is on the surface, so any iron particle, tar spot or bonded contaminant left in the paint is sealed under the coating permanently.

The order matters and it does not change: wash, then chemical iron and tar removal, then a clay pull, then paint correction, and only then the coating. Skip the decontamination and you have polished contaminants into the paint and locked them in for the life of the coating.

This is also why a same-afternoon coating is not a real coating. Decontamination alone takes hours on a neglected vehicle, before any machine touches the paint.

Full decontamination is included at no extra charge in every Stealth Diamond Borograph and Liquid PPF package.

Can you remove rust from my truck or trailer?

Surface rust — orange staining on the metal with no pitting and no holes — is removed and the area protected. Rust that has pitted deeply, flaked into scale or perforated the metal is bodywork rather than detailing, and we will tell you that rather than take the job.

The dividing line is whether the metal underneath is still sound. Run a fingernail or a screwdriver tip across it: if the surface is solid under the orange, it cleans up. If it crumbles, flakes or goes through, no detailer can fix it and anyone who says otherwise is selling you a cosmetic cover-up over a structural problem.

On trailers the rust is almost always at the dissimilar metal joints — steel frame members, fasteners, hinges and latches against an aluminum skin. Aluminum and steel in contact with moisture corrode each other, so a trailer with a spotless skin can still be rusting at every bolt.

How much does decontamination cost in San Diego?

Full decontamination — chemical iron removal, tar removal and a clay pull — is included in our deluxe exterior detail from $156 and in every coating package at no extra charge. Standalone decontamination and rust removal are quoted after inspection.

Rust removal is always quoted rather than listed, because no two cases are the same. A few spots of surface rust on a trailer hinge and a tailgate that has been weeping rust for three years are different jobs at different prices.

Send photos in daylight, close up, and we will tell you honestly which of it is cosmetic and which of it is a body shop conversation.