How to Get Rid of Iron Fallout and Brake Dust Properly (Mar 2026)

Never, ever do this in direct sunlight. If the panel is hot to the touch, you're going to have a bad time. The chemical will dry out, steak your paint, and you'll be spending your Sunday polishing out marks you created yourself.

Give the car a good rinse with cold water first. This drops the surface temp and gets rid of loose dust or red outback dirt that's just sitting on top.

Do a standard contact wash. You want the iron remover to work on the embedded stuff, not the surface grime. Dry the car roughly so the product doesn't get diluted by too much water.

The chemicals in iron removers tend to settle. Give it a good shake before you start.

Start with the wheels because they're always the filthiest. Spray it on dry wheels and watch it turn purple. That's the chemical reaction (sodium thioglycolate) doing its thing.

Use your brush to get into the barrels and around the nuts. Don't let it sit for more than 3-4 minutes.

Now move to the paint. I usually do the back end first (where exhaust soot and road grime build up) then work my way around. Spray a light mist over the panel.

Wait about 3-5 minutes. You'll see the car start 'bleeding' purple. It looks cool, but it's actually just the iron dissolving. Honestly, I wouldn't bother with products that don't have a colour indicator, it's too hard to tell if they're working.

This is critical. If it starts to dry, mist a little water over it to keep it active. I once had a customer bring in a white Prado where he'd let the product dry in the sun... took me hours of machine polishing to fix that mess.

Blast it off thoroughly. Start from the top and work down. Make sure you get it out of all the nooks and crannies, like door handles and window seals.

I like to go over the whole car one more time with the hose just to be 100% sure the chemical is gone. If it lingers in a plastic trim, it can sometimes discolour it over time.

Run your hand (inside a plastic sandwich bag) over the paint. If it still feels like sandpaper, you might need a second hit or a clay bar.

If there's still grit, use a clay bar with plenty of lubricant. The iron remover has done the heavy lifting, so the claying will be much faster and safer now.