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

This stuff is nasty. But it works extremely well. Don't get it on your skin or eyes. There's not really a whole lot to say about it it's awful and it works well

Works great. Good price

Worked well neutralizing the rust on a welding cart I was refurbishing. Follow instructions and wear protective gear.

The product works as it should.It should be obvious to not place the amazon label over the directions and safety warning information but this IS amazon, and safety isnt on the top of their list. Eventually got the label off but it tore and left bits of paper behind that I have to remove bc the label is the cheap paper kind. Luckily the ospho label has a smooth finish so it wasn't damaged.

I used this while restoring my 1957 Cadillac, I stripped all the paint off the body panels and applied this product to convert all the patches and pin spots of rust I had. Being a first time user and having absolutely no idea what to expect from this product, I learned a few things the hard way.First - I started to apply this using a small paint brush- I dumped the Ospho out onto the trunk of the car and started to brush it out smooth. This made streaks and uneven application along with drips everywhere. I realized this was going to be a problem so I then poured some Ospho out onto a sponge and applied it in a nice, thin, even layer thereafter. Any drips or spots where the coating is uneven will leave you with a horrible surface to paint over if you're looking for a smooth finish in the end. I had to sand down some areas to get rid of ridges and dried drops so I could have a smooth, flat surface to paint over.Secondly, make sure the Ospho has dried for the full day! I didn't fully listen to the "24 hour minimum" drying time and took my chances: I applied the Ospho and let the car sit over night. In the morning I somehow had some drip sized spots of surface rust in some spots so I sponged some more Ospho over these spots and let the car sit in the Florida sun. The original coating of Ospho from the day before was about 22 hours in and dry, the touch up spots to get rid of the surface rust were about 3 hours and felt dry from the sun so I shot some primer on the car. The next day, the spots that I only gave 3 hours to dry were bubbled up so I had to do it over, the spots that were ~22 hours dry were fine. Thankfully this was only the trunk area that I experimented with so it wasn't much to fix and do overSo, after my little crash course using Ospho, the rest of the car went smoothly and I am confident I will have no rust issues for a very long time. I shot self-etching primer over the Ospho and it grabbed just fine, I shot urethane primer over the self-etching primer to gave myself a good base for a one stage urethane top coat.

If you want to get rid of rust, just spray it and forget it. The US Navy uses this on their ships.

Just received the product, therefore unable to give a review. However, I have used the product for yrs, was happy to find it on Amazon. No problem with ordering and received as scheduled.

This stuff is GREAT!!! I have been testing different products such as Rustoleum Gel, Evaporust, Etc. For the past year... I ran into this product by accident and saw some of the reviews here. I must say, without having to prep anything, this stuff works great! I have an F150, and if you know about cars, these things rust faster than the average vehicle (especially when you offroad...) I only used half of this bottle underneath the passenger side of the truck and it removed 80% of the HEAVY rust in 24 hours. I just bought the whole gallon and I will be sanding and spraying the whole frame of the truck. I do believe this product can get rid of 99.9% of the rust when doing the proper prep. Highly recommended! ALSO, PLEASE HAVE IN MIND... THIS STUFF HAS A STRONG SMELL, SO IF YOU HAVE ASTHMA OR OTHER RESPIRATORY ISSUES, PLEASE USE IT IN A WELL VENTILATED AREA AND WEAR LONG SLEEVES, GOGGLES, MASK, ETC. PROTECT YOUR DRIVEWAY ASWELL!