Hot Rods Rust stabilization

I am in the process of removing the floors from my '29 Model A. Several areas have surface rust but not rusted thru. I have heard of a product called Rust-Mort used to neutralize rust. I have read some reviews on this stuff and some are good and some say don't use it. Anybody use it? Any other, ideas like self etching primer.

 

I have never used Rust Mort. But I have had great luck with Ospho. Loctite makes some neutralizer in an aerosol can that works pretty decent. Its more expensive than the brush on applications, and doesn't cover as much area though.

 

A popular product is POR 15.
Many good reviews from guys who have used the product, BUT don't get it on your skin. It won't clean off, it will have to wear off. That may take some time.
Some comments in this link
http://www.chevytalk.org/fusionbb/showtopic.php?tid/280575/

 

There seems to be hundreds of products on the market today but I have always cleaned it with a acid and used simple Rustoleum red primer. HRP

 

I've always used Jasco Metal Prep, which is just water phosphoric acid and alcohol. But right after you prep, rinse and dry the metal, you have to oil, grease or prime it right away. If you wait, it'll flash rust as soon as you turn your back.

The thing is, all this rust conversion stuff (Jasco, Ospho, etc.) is just for the rust you can't remove. The rust in the metal pores, pits, and creases which you can't sand or must over-sand to remove.

You first have to remove all the rust you can physically remove, before you use the acid treatments to convert it. It converts from soft, flaky iron oxide (rust) to hard black iron phosphate. Iron phosphate is dense and you can paint it, but it will also come off in chunks if it's thick or just stuck on the surface of something.

 

count me among the por 15 crowd in out of the way places. otherwise there are a myriad of phosporous based rust treatments. all more or les the same thing. I used extend after cleaning my avatar with a wire wheel 15 years ago, then came up with filler and expoxy primers. no issues yet.

 

I have used Rust Mort on a couple of my builds. As Ulu says you need to clean all of the rust off you can first and use the Rust Mort or other rust stabilizer to just insure that the rust in the pits and creases that you can't dig out are neutralized. I suit up and use a heavy wire cup wheel on a grinder to remove 99% of the surface rust first. Then I use the Rust Mort, then clean the excess off and prep for primer. So far I have had no problems but I must admit that my cars only come out of the garage on nice days.

 

This is the product and process that I use as well. So far so good.

 

I used vinegar soaked rags covered up with plastic to dissolve the crusty surface rust on the floor of my wife's Nash Metro. just let it soak a couple days then pull the rags then wire brush off what you can, rinse and repeat as necessary. left the metal as clean as a whistle.

 

I use Jasco. No issues.

 

I used POR, and was happy with the results, but like i was said don't get in on your skin. I had no ideas it was that bad to get off, what a pain in the ass. You just have to wait untill it wear off

 

I've used a lot of SEM Rust Mort and it worked as advertised. I've used a number of other products that worked well also.
The product choice depends on what you want to achieve.

 

If it looks like this, no chemical on Earth can save you.

 

Por15 for me. I've used it on several different cars with great results and it's easy to use. When dry, it's SO hard you can hardly scratch it.

 

I've used Ospho and Rust Mort and they seem to be different brands of the exact same thing. Have had good luck with them over the years. I used to live in the Rust Belt (Northeast Ohio) so my first couple dozen cars had rust issues. Power sand the rust as much as possible, clean with lacquer thinner, give it a light brush coat of Rust Mort or Ospho, the next day wipe it clean again with thinner and then paint or fiberglass over it and you should be good for a long time.

 

Jasco Metal Prep here.
But remember......................."RUST NEVER SLEEPS!"

 

Thanks for all your suggestions. I think after reading some of the comments and doing some research, I am going to use the POR-15, not that I am lazy but it seems like the easiest thing to use.

 

Before I would use POR!
I would use Master series.
I think, much better then POR.
Chuck is a great guy, Product works well also!

http://www.masterseriesct.com/home.html