Favorite/Best Rust Converter

[dean from bozeman]

A buddy wants to know what is my favorite rust converter. I figured that the collective folks on Fordbarn would give a better answer because of the many years of experience.

So I am looking for input on the two following questions.

What is your favorite rust converter? Why is that brand your favorite?

Thanks,
Dean

[marty in Ohio]

Dean,
I don't have an answer for you as I have the same question. Do rust converters really work? I've tried Rustoleum's product on various projects but I don't know if it really pays off. When you have rust, it seems to be an annual problem.
Marty

[aermotor]

I have had good success with SKYCO OSPHO. Others seem to leave a skin that comes off. Follow directions and top coat with something before too much moisture exposure. Ace Hardware and probably Big Box.

John

[kimlinh]

Ospho is excellent.

[Jim Mason]

I've recently purchased mp7/phosphoric acid/Ospho, evaporust, rust 911, and a couple others. will see what works best for me. it will be awhile before I have results.

[Bob Bidonde]

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Encapsulation of rust cuts off the oxygen and moisture necessary for corrosion. POR-15 Chassis Black works very well. Wire brush the rust and overcoat it directly with POR-15. POR-15 dulls with exposure to ultraviolet light from the Sun, so overcoat the POR-15 with a paint finish.


Two cautions:
1. Wear gloves when using POR-15 as it does not come off easily;
2. Do not put POR-15 on threads or use it on threaded joints. POR-15 is an epoxy and it will lock threads with great strength.

[J Franklin]

A surface properly treated with OSPHO doesn't need a primer. I have used Metel Prep as a wash but it is rinsed off with water and then the part sprayed with OSPHO. I have hung sandblasted fenders up in the barn after this treatment unpainted for over a year, and painted them after a final wipe of OSHPO and allowing it to dry overnight.

[aermotor]

I don't believe in encapsulation POR or powder coating (IMO 100% encapsulation can't be achieved) along with the fact that cracks, nicks etc. will allow moisture in and rust will start with little or no external indication. Ospho (phosphoric acid) turns rust (iron oxide) into iron phosphate, an inert hard substance that turns black and in some cases a gray power where there is little or no rust. Excess powder can be brushed off, the rest painted over. I don't know of any other "rust converter" that works - most all others only form a skin like coating.

John

[duke36]

SEM makes RUST SEAL which has good results prior to topcoating.

[estout81]

I have used both OSPHO and 911 with good results. Be sure to follow directions on both. If you can immerse the parts then I would use 911.

[eagle]

I have used POR15 with good results and bad. It seems to depend on what caused the rust. If it is simple oxidation from water or humidity the POR holds up well for many years. I have tried it on more than one occasion on metal that had rusted due to exposure to chemicals or salt spray and it did not work at all, no matter what I used to clean it with first. I think that the pores of the metal hold the corrosive agent and wire brushing and washing with prep and then coating with POR works for a while but the corrosion continues and the coating ends up lifting. The only way to stop that type of rust is sand/bead blasting down to clean metal. So, I think you will find "results may vary".