Anybody used Ospho than Rusty metal primer

Gatordog · Nov 22, 2017

Just wondering if anybody has used Ospho, than Rusty metal primer and than tractor paint for the frame and body panels underneath. The reason I am asking is most people used a thick coating like a Bedliner, but it has been my experience that these thick coatings will trap moisture and create rust that you can’t see because of the thick coating. I was also considering Chassis Saver or Por 15, but I have never used them.

bmc69 · Nov 22, 2017

I use Ospho a lot as a rusty surface treatment. Then a Sherwin Williams industrial epoxy primer over that.

I also use Por 15 on some projects..

Gatordog · Nov 22, 2017

Thanks for tip, I didn’t know Sherwin William’s made a good epoxy primer.

bronkenn · Nov 22, 2017

I have been using POR for years and have had good results. It is a little labor intensive but the extra effort is worth it. Same with KSB coatings. When done properly they are a good choice. If you ever have to do any repairs they are easy to touch up. Ken

bronconut73 · Nov 22, 2017

Love me some Ospho. Been using it since the late 70's.

Whoaa · Nov 22, 2017

I'm another Ospho user!

bigmuddy · Nov 22, 2017

Gatordog said:
Just wondering if anybody has used Ospho, than Rusty metal primer and than tractor paint for the frame and body panels underneath. The reason I am asking is most people used a thick coating like a Bedliner, but it has been my experience that these thick coatings will trap moisture and create rust that you can’t see because of the thick coating. I was also considering Chassis Saver or Por 15, but I have never used them.

When I lived on the coast everyone used it for marine applications. I used it when 8 rebuilt a rusty car trailer, it's been at least 8 years and no sign of rust reoccurring.

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fatboy · Nov 22, 2017

I have used Ospho on cast iron parts like steering box and transfer case housing. Then I hit it with some Eastwood cast iron.

American180 · Nov 22, 2017

Gatordog said:
Just wondering if anybody has used Ospho, than Rusty metal primer and than tractor paint for the frame and body panels underneath. The reason I am asking is most people used a thick coating like a Bedliner, but it has been my experience that these thick coatings will trap moisture and create rust that you can’t see because of the thick coating. I was also considering Chassis Saver or Por 15, but I have never used them.

I was thinking about using POR 15, then bedliner over that. Has anyone tried this?

KeithKinPhx · Nov 22, 2017

Using Ospho right now on my 68 restoration. Since it is water like I am flooding it into the seams between the sheet metal. Ford put zero protection between those spot welded panels. I'm working on a YouTube video on it.

Any other rust on the columns etc will be sprayed with Ospho out of a bug sprayer. I might shoot some Eastwood frame paint and sealer as well.

If using near a painted surface be careful as it is an acid. One guy on YouTube treated the driver side of the roof of his car but let it run onto the passenger side. That paint will never be the same.

Skiddy · Nov 22, 2017

and really should use a respirator, I never did but should of lol. we used to use it all the time at work until the safety/enviro Nazis said we couldn't any longer

fordguy · Nov 23, 2017

yes it is breathtaking, so a mask should be used.

agboy91 · Nov 23, 2017

I have used it with good results. I'd suggest I wipe of excess as it can develop a white Chaulky powder when it dries.

c0astie31 · Nov 23, 2017

Used it on my 76, worked great on the panels i saved,

sanndmann3 · Nov 23, 2017

I've never heard of it... will have to look into it for future reference.

NGABronco · Nov 23, 2017

sanndmann3 said:
I've never heard of it... will have to look into it for future reference.

Look at Sherwin Williams Commercial locations, regular SW paint stores don't usually carry it, it's about $27 a gallon. Good stuff!!!;D;D;D

sykanr0ng · Nov 23, 2017

www.ospho.com

Sold by Amazon, Jamestown Distributors, West Marine, Ace Hardware, Walmart......

bronconut73 · Nov 23, 2017

Sherwin Williams often sells a product called Tex-Guard. Seems to work just like Ospho except it is blue instead of green. Like Ospho it is low viscosity like water and can really creep into places.

I usually used a combination of Naval Jelly and Ospho on my stuff. They both have their place in the world of rust.

bigmuddy · Nov 23, 2017

NGABronco said:
Look at Sherwin Williams Commercial locations, regular SW paint stores don't usually carry it, it's about $27 a gallon. Good stuff!!!;D;D;D

I usually fond it at ace hardware.

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Attac · Nov 23, 2017

I was going to use raptor on the underside of my sons bronco but decided on por. Bed liner is harder to wash and por looks like powder coat when done correctly. You can thin it and spray it and it works into all of the seams. I also did my engine compartment. It is supposed to be inpregnatable to most all fluids. I have had a leak of brake fluid before and it completely ruined my paint on the driver inner fender.
It claims you can beat it with a sledgehammer after it cures and it will not chip. I can tell you this is absolutely true. My auto twirler was never painted so it had light rust all over. I hit it with a D A and then washed it and painted it. 3 weeks later I decided to test it. It doesn't chip. It really works. It has been painted for about 9 months now and still looks wet. Just my experience
Chuck

Anybody used Ospho than Rusty metal primer

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