Getting Your Paint Smooth as Glass: The No-Nonsense Guide to Decontamination (Mar 2026)

Never, and I mean NEVER, do a full decon in direct sun. If the panels are hot, your chemicals will dry out and leave streaks that are a nightmare to get off. Do it in the garage or early in the morning.

Always start with the wheels. They're the filthiest part. If you do them last, you'll splash brake dust all over your clean paint. Use your iron remover here too.

Blast the car down with water. Focus on the wheel arches and lower sills where the mud and salt sit. If you've just come back from the beach, spend extra time here.

If you've got a foam cannon, use it. Let the soap dwell for 5 minutes to soften the dirt. If not, just a very wet initial wash will do.

Wash the car top-to-bottom using the two-bucket method. One for soapy water, one for rinsing your mitt. This ensures you aren't putting dirt back on the car.

While the car is still wet (but rinsed of soap), spray your iron remover over the paint. Focus on the bonnet, roof, and rear. These are where fallout settles.

Wait about 3-5 minutes. You'll see the liquid start to 'bleed' purple. This is the chemical reacting with iron particles. Don't let it dry!

For really dirty cars, I sometimes use a damp wash mitt to gently spread the iron remover. Don't scrub, just move it around.

Blast every bit of that purple stuff off. Be meticulous around window seals and door handles.

Dry the lower half of the car. Spray tar remover onto those black spots behind the wheels. Let it sit for a minute, then wipe away with an old microfibre.

Now the paint is chemically clean, we go mechanical. Get your clay bar or mitt and your lubricant ready.

Spray a 50cm x 50cm section with plenty of lube. You want the clay to glide, not stick.

Slide the clay back and forth in straight lines. Do not use circular motions. You'll feel and hear it 'grabbing' the contaminants. When it starts sliding silently, that section is done.

If using a bar, fold it frequently to expose a clean surface. If using a mitt, rinse it in your wash bucket often.

Wipe the section dry and use your bare hand (or the baggie trick) to feel the paint. It should be smooth as a mirror.

Don't forget the glass! You can clay your windows too. It helps wipers work better and stops that annoying chatter.

Give the whole car one last rinse to get rid of any leftover clay lube or residue.

Use your big drying towel. Pat the surface rather than dragging it to avoid any chance of marring.

Spray a bit of IPA or panel prep on a clean microfibre and wipe the car down. This removes any remaining oils so your wax or coating can bond properly.