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19 of 19 found the following review helpful:
 Effective way to cover rust and stop it from spreadingJun 29, 2010
By Stephen M. Charme
I have used this product for years to cover up rust on many items, such as my boat trailer, boat lift, trailer hitch receiver on my car, and black wrought iron furniture. This is very simple to use--just spray on and you have a paintable black surface instead of rust (though of course you don't have to paint anything). It's a very easy way to stop rust from spreading.
If you don't want something that sprays on black, then you can use naval jelly (which I have reviewed on Amazon), which will turn your rusted surfaces into a very dark brown, but will not affect surrounding painted or aluminum surfaces (like on patio or beach chairs) if you rinse it off right away.
I use this product on any surface where I want a black appearance and don't have to worry about getting it on surrounding painted or aluminum surfaces.
Bottom line: This is a great product for rust problems. Just keep in mind that using it is just like spraying on black paint.
Update February 27, 2011: I recently discovered VHT rust convertor on Amazon (and have reviewed it), which is a liquid spray that goes on clear and converts rusted surfaces the same as naval jelly. I now use that sometimes instead of naval jelly.
15 of 18 found the following review helpful:
A coup-de-grace for residual rust on properly prepped surfaces, but not a "rust conquerer"Aug 10, 2011
By Bess
"Somewhere In The Universe"
My comment here is for people looking to use this in an automotive underbody application.
None of it has to do with people using Rustoleum Rust Reformer for light-duty stuff like spraying patio furniture, or whatever.
Anyway, there are two types of rust. Surface rust, and structural rust.
If gone unchecked, surface rust can become structural rust. Once you've arrived at structural rust (as evidenced by material loss and heavy flaking), there is no liquid in a can- not even the much vaunted and very expensive POR15- that will conquer it. At this point, the best case scenario involves a welder. Worst case scenario involves the scrapper. If you're looking for something you can 'paint on and the rust will go away', maybe it exists on a magical island inhabited by the Tooth Fairy and Santa, but it doesn't exist in the world you and I live in.
I bought 3 six packs of this stuff from Harbor Freight for use on a car with heavy underbody rust. The car was at the point where immediately taking rust countermeasures might wring a few more good years out of it, but the beginning of the end had commenced and if left untreated, this winter would be its last.
First, you must prep, prep, prep. This involves a wire wheel on a drill or grinder. You must power off all the surface rust, flaking and get down to bare, solid metal. This can be a very intimidating task for a car that has a completely rusted underbody, but that's the job that must be done. If you aren't up to doing it, sell it to someone who is. There's also the painful possibility that as you remove rust, you're going to learn that it was worse than you had originally thought. Pay no attention to anyone who tells you to leave the rust there for structural reasons. Rust that can be removed with a wire wheel has lost all structural integrity anyway, so you aren't doing any 'harm' by removing it. At that point, it isn't holding anything together anyway.
You cannot just spray this over untreated rust and expect to be done. Sure, it might make the surface look prettier, but the cancer is still alive under that coat, eating away your car. There were some of areas I wasn't able to get the power tool in to (I was doing work with body on), so I just handbrushed them and sprayed. Sure enough, the rust reformer definitely had a chemical interaction with the surface rust, but immediately peeled back off once it dried, since the rust membrane was too deep.
Is this the fault of the product? Definitely not!
You can't expect a spray-on coat to penetrate into a rust chunk thicker than a quarter dollar and completely 'neutralize' it. It was very apparent, very quick, that this product worked just fine on light surface rust- it actually created a very nice, durable primer coat- but on thick structural rust? Forget it. Not this nor any other liquid product can remedy that.
Where this seems to really do well is delivering a coup-de-grace to rust on a surface that's already been mechanically prepped. No matter how hard you wire it off, there's still going to be microscopic rust in that metal- I believe this would work very well to finish that off. When I examined the backside of the dry peelings that weren't able to adhere to the structural rust, it showed there definitely was a good chemical reaction between the rust and the coating. On a 'bare metal' surface, there's no doubt this product would do the trick and kill whatever little rust that might remain on the surface that you can't see with your naked eye.
Also, this is pretty much a rust neutralizing primer- you're still going to need to topcoat with something.
4 stars out of 5 because of the three 6 packs I bought, there were two dead cans.
Don't buy it thinking it can perform miracles and you'll definitely be happy with it. Now that I know what this product is good for, I can envision myself using it quite a bit from now on.
3 of 3 found the following review helpful:
Product is as good as advertisedAug 29, 2011
By No Name
I used this product to get rid of the rust on the iron hand rails on my front steps.
It preformed as advertised. I applied a top coat and the rails are rust free six months later.
1 of 1 found the following review helpful:
Works As StatedJan 08, 2011
By Rhinin
Rustoleum makes great products, and this is no exception. Make sure you use the Rustoleum Professional series spray paint as the top coat. I retreated an outside gas pipe that had not been painted in 10 years, and the results were great using both products.
 not extendApr 04, 2012
By BOB
This is not extend. It just covers the rust. Also it come off easy. Must have 2nd cover. Does not change the rust to black. Just cover it over.
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based on 7 reviews
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