Autoglym Magma Liquid Clay, 500ml - Colour Transform Technology Bodywork and Wheel Fallout Remover, Removes Stubborn Iron Specks From Car Bodywork, Brake Discs, Car Wheel Cleaner

Magma is designed to break down iron particles embedded in paint and wheels—brake dust, rail dust, and airborne fallout. Spray it on a clean, cool surface and watch it react visibly, turning purple where iron is present. It works on body panels, alloys, and glass, and rinses clean with a pressure washer or hose. It’s pH neutral, so safe for clear coats and sealants. Unlike clay bars, it doesn’t scratch or require manual rubbing. It’s especially effective on white or light-coloured cars, where iron spots are more visible. On wheels, it foams slightly and lifts grime without needing heavy agitation1 2 . ✅ Pros Colour transform tech—shows exactly where iron is breaking down Safe on paint and wheels—pH neutral, non-abrasive Mild scent—less offensive than typical iron removers Effective on first pass—often no need to reapply Preps surface for wax/sealant—smooth finish after use Can be used on glass—removes embedded particles ⚠️ Cons Not a clay substitute for tar—may need separate tar remover Avoid brake discs—can degrade surface if left too long1 Don’t apply in sunlight—can dry and leave residue2 Nozzle can clog—rinse after use Premium price—around £10–£12 for 500ml 🧍‍♂️ Personal Verdict Used this on a white Qashqai and alloy wheels—purple reaction kicked in fast, rinsed clean, and left the paint feeling smooth. For under £12, it’s a proper tool for deep cleaning before waxing or sealing.

Very good at removing iron from car paint. Works quick and is easy to use.

Even after reading all the positive reviews I still felt skeptical going into using this product... was it really going to be THAT good?! But it was! I have recently purchased a VW Beetle that was bought from a garage located very near a railway line and was also off a busy road which also had a building site across from it. It was literally covered in little rust spots from iron particles and had quite a rough gritty feel to the paintwork. This product worked wonders and the paintwork now feels as smooth as silk. It removed the vast majority of the rust spots, a second use will be needed to get a few more stubborn ones, but overall it's changed the quality of the bodywork massively. I would highly recommend this product and will buy it again myself. Just note that if the product gets onto your skin it leaves an unpleasant smell which is hard to remove.

I recently tried out the Autoglym Magma Liquid Clay on my car, and I must say it delivered impressive results. This product excels at removing stubborn marks on both the paint and tires, leaving my car looking refreshed and revitalized. I was pleasantly surprised by how effortlessly it tackled deep-seated contaminants, restoring the smoothness and shine of my car's surfaces. The Autoglym Magma Liquid Clay proved to be particularly effective at removing marks on both the paintwork and tires. Its specialized formula ensured that even the most stubborn blemishes and debris were lifted away, leaving a noticeably cleaner and more vibrant appearance. While the product performed admirably, I did notice a slight scent while using it. Although not overpowering, it is worth mentioning for those who are sensitive to certain odors. However, the overall performance of the product far outweighed this minor drawback. In conclusion, the Autoglym Magma Liquid Clay is a reliable car cleaner that exceeded my expectations. Its ability to effortlessly remove stubborn marks on the paint and tires is commendable, and the results speak for themselves. Despite the slight scent, I highly recommend this product to anyone looking for an effective solution to revitalize their car's surfaces.

Great product, and it works. Thought I might have to cut and polish the rear of my car because of stubborn iron deposits and grime, but hey, sprayed on as instructions, left for a short time, turned purple, jet washed off and washed with car shampoo. Total delight.

AutoGlym Magma, A solid product that get rid of ingrained dirt of the bodywork and wheels. I personally just sprayed the solution on the panel or wheels and left to dwell for a couple of minutes before washing off. I would say this doesn't replace the liquid clay however, it does do the job its states and its pretty much effortless to use so to some its less effort and i was impressed with the results. I should state this is to be used after the car is cleaned. Overall a quick spray is all that's needed, i liked the results and felt it was good value.

One of the best products I have ever used. Some idiot used an angle grinder near my car and showered the wing with little flakes of metal that in bedded them selfs into the paint. A few days later I noticed little orange speckles in the paintwork where the metal swarf had started to rust. Two treatments with this and the rusty particles are totally gone without having to use abrasive methods and the paintwork is restored.

Never used iron fallout before but this seems to work well and gave my car a nice clean look, would be good if the bottle was a bit easier to use.