Ospho 605 Metal Treatment, 32 Fl Oz (Pack of 1)

Great product, covers rust, then can paint

Saw this product being used on the Obsessed Garage site on YouTube, so gave it a try on the exhaust of my 2017 Porsche 718 Boxster. This car lived in Pennsylvania for it’s first eight years, was clearly driven in the winter on salted roads, and the undercarriage had rusted nuts, bolts, and the stainless-steel exhaust was coated in rust. I used this Ospho product by putting it in a spray bottle and then used “#0” (fine…but not very fine) steel wool and a couple green Scotch-Brite heavy duty scouring pads. I put some plastic sheeting on my garage floor and then put cardboard on top of the plastic and then put the exhaust on the cardboard. I spent a little over an hour each cleaning both sides of the exhaust (total of about two hours on my knees and butt on the garage floor). To clean and neutralize the acidic Ospho, I used another spray bottle with Dawn dishwashing detergent diluted in water (Dawn is alkaline and is a good acid neutralizer). I used the Dawn and some paper towels to periodically wipe off the Ospho after scrubbing…and scrubbing…and scrubbing the exhaust. Overall, the Ospho worked very well to clean the exhaust with a lot of elbow grease to make it work, and I am happy with the end result. With that said, it wasn’t hard work, but it was time consuming. The cardboard got dirty and wet as expected, and I just threw it in the trash and clean-up was easy. There were some stains on the stainless-steel exhaust that would not come out, but I tried using some sandpaper on these spots and they still didn’t come out, so the remaining stains were no fault of the Ospho. If the exhaust was regular steel and not stainless, I doubt the Ospho or anything would revive regular steel that had been exposed to winter salted roads for eight years. I included two photos: one is a before-and-after with one side of the exhaust in original condition and the other side after being cleaned with Ospho. The second photo shows both sides of the exhaust after being cleaned with Ospho.

The rusted iron on an antique train station bench looked so good after applying this that I decided against painting it. Awesome stuff...

It De-Rusted an area on my Exhaust System at the Coupling end of the Muffler, where the Tail pipe connects to the pipe coming out of the muffler with a clamp. I poured some in a Plastic Spray Bottle and sprayed the coupling and the area around the coupling that was starting to show rust and it Stopped It !!! Great Stuff. It converts Rust, Iron Oxide into Iron Phosphate...The phosphoric acid in OSPHO reacts

This was recommended by my research. Doesn’t always work for me. Maybe I am doing something wrong… Tried it on a rusty hitch with some wire scraping and it worked some, but not great. Used it on my plow blade…same result. Used it on a fire pit and that was ok.

Best rust treatment available. After treatment and paint, rust doesn't return.

I have tried many cheap rust remover in the past, and all of them did not work well after month or so. Since many people recommend this product, so I tried this product. It was eye opener! Almost shockingly work well! I know this is more pricier than other product, but wow definitely worth it!! Highly recommend this!

Works great

Great stuff for removing gun metal blueing, or use brick acid as this is cheaper. Great for pave blocks too.