I've used this rust reformer on the exterior sheet metal of a project vehicle to protect it from further rust while I continued to work on it. It really does stop rust from forming. Break the loose rust free (wire brush), spray it with rust reformer, and move on with life. If you're working on something that will need a top coat of paint and to look decent, this might not be your product. The surface will still have the uneven texture of rust. But your car's frame, or anything metal that isn't a 'show piece' will do just fine.
This turns rust into a hard primer. You need to clean off the loose rust only, then spray onto the firmly attached rust. It turns it black in about 24 hours--perfect primer--made from rust on the item!
I re-spray with zinc chromate or gray primer, then finish coat--great protection.
Used this to spray over some rust on my old Honda CB350 frame under the tank. I just sanded down the rust spots and hit it with some Rust Reformer and BOOM - the frame looks as good as new. I highly recommend this product.
It sprays pretty good, but it paints surface dark black, which may be good if that is desired (like if you want to spray on under surface of a car etc), but if you want to fix rust where there is some other paint then you have to be careful/mindful of this.
What I like about this, its spray is pretty strong and smooth. Since it turns surface dark black you can't tell if it has turned rust into something else or not. Only time will tell.
Spraying some oil stem pipe braces for my steel pipe fence. Took a lot of it to cover the rust, and the rust kept coming through. Did more surface prep, and still had some showing through. After multiple coats, I used a top coat of white enamel. Some of the rust still came through even that. Great idea, to passivate the rust so you don’t have to scrape it all off, but it takes a lot of spray and the results are hit and miss.