Koch-Chemie - Reactive Rust Remover - pH Neutral Cleaner; Use for Rust, Metal Particles, Burnt-in Brake Dust and Other Pollutants; Gentle Formula (5 Liter)

This actually works. Doesn't completely take off the rust but does remove most of the light surface and makes it ready for paint

I don’t know what ancient German spellbook KOCHCHEMIE pulled this formula from, but this stuff *obliterates* rust like it owes it money. One spray and the corrosion practically packs its bags and leaves in shame. The chemical reaction happens fairly quickly, pretty cool to watch.Let’s address the the smell. It smells like hot pennies mixed with expired pickles and sadness. You’ll question your life choices for a moment... but then you’ll see the rust vanish before your eyes, and all is forgiven. Worth the money, I wish there was more for the money but still would consider it decent value for the performance.Bottom line: it’s like a spa day for your metal parts. Absolutely worth the stank

Good product

It smells absolutely horrid but the results make up for that. It works phenomenal to remove rust. The smell will linger which is a huge drawback.

Saw this on you tube… Was not disappointed. Took all the brake dust spots off my white vehicle. It was like magic!

Chemicals should smell bad if they are any good. This stuff doesn’t smell great but it works exactly as promised. What an amazing product. I will order more products from this brand.

The product worked very well in removing oxidization spots on my white car. However, I won't use it again due to the very bad smell and the toxic foam all over my driveway that results when spraying it off the car. I'm sure it has left residue that will take time to wash away. Unfortunately, I read the Safety Data Sheet after using the product.UPDATE: 3 days later I can still smell this on my car and in my yard. Do not recommend.

Really worked well. Resolved the rust right before my eyes.