Have any of you restorers out there ever used a product called Ospho? It is a liquid, white in color that you brush on to a rusted surface and it turns the rust black supposedly neutralizing the rusting action and sealing the surface. I have heard good and bad and thought I would seek more responses to this product.

 

I haven't heard of it but if you use it and it works please share the info.

 

Hi Guys -

Yes, I've used it a lot. All the Ospho I've found is Green.

There's been much talk about it in the Bodywork forum so you may want to check around or do a search in that forum.

If you have any other questions, ask in the Bodywork forum and you should get all the answers you need.

 

Thanks, lots of good information there. Also, I am surprised, one thread said Home Depot carrys it.

 

All that kind of stuff has just gotten very important to me.

But I'd rather clean metal down than change it into something else, if possible.

Dunno what I'm praying for, but there it is....


(I assume most people know about the CORD project, if not it's on my homepage)

 

There are a number of products that brush on rust and turn it into a black inert plastic. The chemical name is Noxorox, and it is sold by about twenty sources.

NAPA auto parts sells 'Extend' which works very well, as does the product from Rustoleum which I can't remember it's name.

Yes they do work.

 

It is used very much here offshore,works great too. Turns rust into a paintable surface. Good stuff!

 

I am intending to use it underneath the truck on parts like the oil pan, gas tank and differential housing and other places that are prone to rusting. Im not really concerned about the appearance, just keeping the rust in check.

 

Mantta -

No matter where you're using it, you will still need to put some kind of paint over it otherwise the rust will be right back. For the areas you're talking about, I'd use either POR-15 or Rustoleum.



Greywolf -

Yeah, I checked out you CORD Project. It's gonna be sweet, but I have to say one thing - clean your garage!!

Seriously, I took our truck down to the metal, then used Ospho before primering. We wanted to make sure we had some kind of protection in those unreachable areas along with all those small pitted areas the blasting may have missed.

 

The OSPHO I found at the hardware store is a phosphate product (thin green liquid) to coat bare metal between paint stripping and primer.
Alan P

 

I've gone back and searched and read the posts related to OSPHO, there are quite a few. Carlene and others like it and it looks like it's well worth using, especially on the hidden areas.

OSPHO can be used down to 36 degrees, so it might be a good first coating for panels when it is too cold to primer.
Seems it can be sprayed on and left as a primer, or sprayed on and washed/wiped off as a etch. Can OSPHO be welded thru?

Alan P

 

Hi Alan -

Yes it can be welded. Then just wire brush the welded area and re-Ospho that area when you're done. Also, keep an eye out for the slag. Those tiny little critters attach to everything along with being unsightly little bumps, they will start to rust.

 

Can you use body filler over the Ospho without priming first ?

 

Hi Gary - Welcome to FTE & the Bodywork forum.

This is kind of a "Which Came First" question.

There doesn't seem to be any agreed upon answer to this. Some say "filler then primers" others are "primer, filler, primer".

Personally, I'm going with the primer then filler then primer. As for the Ospho, I just treated it as if it was bare metal and went from there.

Hope this helps.

 

Hello everyone,

I hope this message finds you all in good health. Recently, I came across two products, OSPHO and Rust Converter, that claim to have effective rust transformation and metal surface restoration properties. However, I find myself in a dilemma and would greatly appreciate your advice on this matter.

If any of you have firsthand experience using either OSPHO or Rust Converter, I would be grateful to hear about the results you achieved. Specifically, I am interested in learning which product proved to be more effective in transforming rust and providing long-term protection for metal surfaces.

Your valuable experiences and recommendations will play a crucial role in guiding my decision-making process. Thank you all in advance for your kind assistance.

Best regards,
Artina