Ospho 605 Metal Treatment

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.

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

Works great

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 product does the job it is intended for. I use a spray bottle that has single stream and spray and I use a paint brush and a rag. It is both a sealer and a primer. It eats rust, just follow simple directions. I have tried other products, but this is my choice. Currently using Ospho on a refurbishment of a 1971 Pontiac GTO. Thank you, OSPHO.