An ounce of prevention is worth 1500 pounds of cure......

[a31ford]

Good evening everyone.

Most of you know that I'm in the middle of a resoration

http://www.therangerstation.com/forums/showthread.php?t=130031

I've used "Phosphoric Acid" on the underside of the cab (as rust prevention).

For those of you that have never heard of this, here is the information on doing it.

First off, I use this product:

WARNING !!!! Use rubber gloves, and do NOT get it in your EYES !!!!!!!!!!!!!!!!!!!!


use a small open container (sour cream container works nice),

DO NOT return unused acid to original container, once the brush has contacted rust, it will activate ALL the fluid in the container, (this is the reason for the seperate container).

use a 1-2" paint brush, and simply brush on (NO SPLASHING, you will get it in the eyes and it WILL FLIPPIN STING !!!!! and you will have to go to the hospital.....

a couple of small drops on your hands or skin will give you a metallic taste in your mouth about 30 minutes later

(TRUST ME< THIS IS NASTY STUFF).

Some photo's of the before and during (after will be added tomorrow afternoon)

Just lifted, still dirty

Just washed with pressure washer.

phosphoric acid treated (Just done).

Closeup of passengers side front mount

You MUST wait at least 24 hours before painting, (read and follow instructions on bottle).

That's it, the stuff is water soluable (when liquid) when dry, it's tough as nails, AND chemically converts rust into a black / grey primer, it KILLS RUST.

I have othe cars that where done 15-20 years ago and the rust has NOT come back in the area that was treated.

Greg

 

[alwaysFlOoReD]

I've used a similar product. It works like you say but will not stop rust without a top coat of paint or clearcoat. I've had a sandblasted bumper sitting outside for 9 months that was treated at the beginning. It was quite rusty at 8 months when I again sprayed, but only one half. The rust was again converted into a purple-black primer-like substance but is already showing signs of rust again. I was hoping that it would be a permanent solution unfortunately I'm going to have to paint. I do like the product for rust conversion tho.

Richard

 

[killj0y]

Sounds like it's just acid that eats away the rust layer...

 

[daniel3507]

Im anxious to see the after shots.

 

[a31ford]

As soon as it stops raining, I'll go out and get some after shots, Richard is correct, it has to have some form of top coat (paint or undercoating), that is tomorrows project. I'm thinking red paint, or undercoat.

The acid only eats a thin film of rust, the action is actually a chemical change into a blackish epoxy type finish, what they put in the bottle with the phosphoric acid I have no idea, but it does indeed slow the ageing process down. Many years of "body" will be still left on this truck because of the treatment.

Trust me, I'm crazy to do all this work on this thing..........

 

[Andy D]

I found a 1/2 used jug of OSPHO washed up on the beach. Stuff is nasty and I tried not to breathe it but it works okay. I wish I had a backhoe to play with too

 

[a31ford]

LOL, that's a 1947 Minneapolis Moline model "R" plow tractor with a "Du-All" bucket, cira 1958 or so.

It's a 4 cyl. tractor with an extremely long bucket. Bought the whole ring for 400 bucks and drove it home about 7 years ago.

Greg

 

[straycat]

I used this some years back on one of my vintage flat tracker bikes. It is a good product. Just remember that once you open it it will not last very long. It only has a shelf life of about 6 months once opened. So use it up ASAP.

 

[lil_Blue_Ford]

LOL, that's a 1947 Minneapolis Moline model "R" plow tractor with a "Du-All" bucket, cira 1958 or so.

It's a 4 cyl. tractor with an extremely long bucket. Bought the whole ring for 400 bucks and drove it home about 7 years ago.

Greg

I think we need a pic or two of the tractor now....

 

[a31ford]

OK, so the process has started (it will take another 10 hours or so to complete. and I'll take more photos then)

so 1/2 way into the treatment (remember 24 hours).

same shots, (roughly)

Before

After

Before

After

Look at the spot welds in the close up, there are indeed subtle differences, I'll take more shots later today.

Greg

 

[daniel3507]

So you need to wait 24 hours after the treatment to paint it? Seems like a pretty nice product. Combine it with POR 15 or something like that it sounds like you wouldnt have to worry about any rust anymore.

 

[a31ford]

Lil_Blue_Ford wanted some of the tractors, here the three "sisters"

1949 Moline "Model Z"

1947 Moline "Model R"

1958 Moliine "Model 5 Star"

Greg

 

[a31ford]

OK, the etching action is done, and I've cleaned the fluffy white salts off, and it's ready for paint.

NOW, what color should it be ?????

Greg

 

[Ryannn]

Thats amazing! Black by the way!

 

[lil_Blue_Ford]

I say shoot it with some oil based tractor paint, then spray it with a coat of oil and dust it. You'll never have a rust issue again, lol.

Nice old tractors, BTW.