Ospho Metal Treatment Ospho OSPHOG Gallon Made by Ospho

Used this product for years,, works well..Great service from supplier.

As others have mentioned, this product arrived very poorly packaged…It was loosely packaged in a box, with a bit of packing “crate paper”….This is a great product, but definitely a “dangerous good”…The Amazon delivery person, had no idea that he was delivering a bottle of concentrated Phosphoric Acid and there was no label to that effect on the outside of the package…As I said earlier, the product itself is excellent, and I would highly recommend using it for the removal of rust…I would give a 5* for the quality of the product, and a 1* for the packaging…

OSPHO works great and is made in USA. I have been using it on tools, drill bits, lawnmowers, etc., for years and recently bought a gallon to eliminate the severe rust under my car (c'mon Toyota!). To clarify, this isn't a rust encapsulating paint, it's a rust eating/neutralizing acid type treatment. It eliminates rust (turns black) so it can be repainted.There are a few reviews that said it didn't work completely - it actually works great, but with a few caveats:- On deep or thick (layered) rust you should wire brush it first to expose the bottom layer. If you don't, there may still be rust under the top layers. Close pressure washing works also.- Any oil or coating on the surface can prevent this from getting to the rust. When necessary, I use alcohol or dawn detergent to clean the surface. With any detergent you must rinse thoroughly, as some leave a water spot reducing film.- On heavy rust it's good to wire brush after treatment to make certain you got it all. A few times after treatments I wire brushed and rust dust appeared. A second treatment usually gets the rest in heavy rust applications.It was great to find this in gallons at a very competitive price!

I've tried quite a few rust converters with mixed results. Most that work seem to always have a downside or need to be cleaned up afterwards. This stuff works awesome and is about as simple as it gets to use. Just spray it on and let it do its thing. No need to clean the next day with acetone to neutralize the product. It will leave a whitish film after a few days that can simply be brushed away before painting. I've used this on my Sprinter, our excavators, our semi's, dump trucks, heavy equipment, etc. The rust goes away and unlike some of the other stuff I've tried it doesn't start growing again a month later. Highly recommended.Oh, it's more cost effective to get a gallon than the quart size. Make sure you compare prices before buying.

I’ve used Ospho for 30+ years in the marine industry and always keep some around the house. It can be sprayed on, brushed on or as a dip for tools and other Iron, Steel or Aluminum items that need stains or rust or aluminum oxides removed. Works instantly on faucets, shower heads and tubs to remove calcium deposits and rust stains. Works great for iron stains from well water. Household rust removers don’t hold a candle to this stuff. It’s real strong so you’ll need to rinse off what you’ve used it on. Try not to get any on ya…

First: I bought this Ospho with my own money and I am not being tortured to write this.As you know painting over sanded rust doesn't work for very long. I've used various rust "converters", and I like Ospho best so far. Just scrape off loose rust first. Try a "flap disk" on really thick rust. Then slop on the Ospho and leave it overnight. I keep a supply of cut-off plastic bottle bottoms for this step and painting in general, so I don't contaminate the supply bottle. If it doesn't look rust free, I do it a second treatment. Usually the first treatment is fine. Either way, it goes really fast. I use cheap "chip" brushes, work outside because it's going to drip. Don't get it on your clothes because it's an acid. I like using a brush because it mechanically pushes whatever I am using into the surface better than spraying or rolling. I spray off the surface with a hose, let that dry and then prime and paint.I work on a lot of different things and use a lot of different products, and find it useful to read reviews before I try something new. I'm mystified by the usually small number of one star complainers and wonder if they read the directions, actually plugged the device in, put good gas in it, shook the container first, stirred, etc. You don't have to shake, stir or pull start Ospho. I have never had any issues with Ospho containers. I hope you don't either. This is good stuff, easy to use. It works.