POR-15 Rust Remover, Rust Dissolving Solution, Reusable and Biodegradable, 32 Fluid Ounces

Used on restoration of two rust covered carbon steel pocket knives. At 12 hours it had stripped away the corrosion and loosened up the slip joints as well. Easy to follow directions. Easy cleanup.

I restore old trucks with parts that are obsolete (can't get them anymore) and fight corrosion daily. This works great soaked overnight aggitating the solution and parts periodically. Let soak overnight and the rust is dissolved

I was working on a project that included nearly 20 feet of chain and a separate pulley. I wanted something that would allow me to soak them rather than to spray. This fit the bill nicely.This is exceptionally easy to work with. After soaking the chain, everything rinsed quite clean. Water rinsing was an added benefit.It was interesting to find that there were areas of paint on the pieces that I hadn't noticed before due to the surrounding rust.

I love this stuff for soaking old rusty tools, to restore them. Great for restoring old Disston saw blades too. I've reused it a few times, but it doesn't get very many multiple uses before it's black and then coats your tools in a black coating too. It's hard to clean that off of smaller parts, but at least it still removes the rust at that stage. Weakens rapidly each time. Still, it really works great, especially on antiques, I just hoped to reuse it more than I did, for the $30 a gallon pricetag.

I bought 2 gallons of this stuff to remove the rust on the inside of the gas tank of a 51 year old Yamaha Enduro. (It was extremely rusted!) I poured both containers into the gas tank, left it overnight and the next day all the rust had been removed. I poured the product back into the containers. It was really brown and dirty. But it still worked later when I used a cup of it to remove the rust from two exhaust pipe flange nuts and washers. Certainly worth the money!

I've used this on a rusted bathtub drain protector, with its attaching screw. I soaked the rusty protector and screw in it for over 24 hours. The product does seem to have dissolved some of the rust, but not very much. I also tried it on a painted heating vent cover with small spots of rust from condensation. Too big to immerse. I applied the product and then re-applied it multiple times. Some rust comes off by wiping using a rag soaked with the product, but not much. The product is not what I hope for.

This work perfectly would 100% recommend

The POR 15 is excellent but I saw no results in applying this to the metal I was prepping.