Surface rust on rearend

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kels87gn

Member
Joined
May 16, 2012
Messages
228
I was wondering what the best process would be to touch up the looks of a stock rear axle. I was hoping for ideas before I purchase sway bar and diff cover. How do i prep things prior to paint etc. Any ideas/pictures appreciated. I'll post a picture of mine tomorrow so you can see what I'm talking about.
 
I degreased & wirebrushed mine, sprayed it with Ospho, let that dry, then foam brush painted it with black gloss Rustoleum. Looks great. I even repainted the big orange P on the bottom of it.
 

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Rust is actually "correct" as they came of the car carriers at the dealer that way. That said, I'd go with Eastwood Chassis black. The Krylon old 1613 was a nice fastdrying semi, but doesn't hold up like the Eastwood.
 
Above is corect like most of front end parts and driveshaft GM did not paint that parts in question....ideally from my point of view I would do everything in a satin black color that way it blends in better rather than draws attention to the area and looks better than rust.

Whatever prep work or product works best is your choice or suggestions mentioned but satin black for a color would be the best.

denniskirban@yahoo.com

I have a little experience on these cars.....
 
I degreased & wirebrushed mine, sprayed it with Ospho, let that dry, then foam brush painted it with black gloss Rustoleum. Looks great. I even repainted the big orange P on the bottom of it.

I'm assuming the "Big Orange P" was for "posi" ? Mine WAS a pegleg, so it did not have the "P".
 
It is true, the rearends were not painted. Mine was slathered with undercoating. I used kerosene to remove it along with a putty knife. That is why the P was there waiting for me to find it, the undercoating preserved it. However I was not looking for concours or original when I cleaned it up; I like the suspension painted black. I did the control arms front and rear also. Had those sandblasted first, they were rusted pretty good.
 
My underside has some scale. I pulled the tranny pan when changing the oil and filter, wire brushed it, painted it a flat black. I did the same with my rear diff.
I plan to go through the entire underside with rustoleum rusty metal primer and then satin or flat black. My number on priority is to seal up so she'll last for ever.
Joel
 
My underside has some scale. I pulled the tranny pan when changing the oil and filter, wire brushed it, painted it a flat black. I did the same with my rear diff.
I plan to go through the entire underside with rustoleum rusty metal primer and then satin or flat black. My number on priority is to seal up so she'll last for ever.
Joel
If you want it to last forever, then use Por 15. This stuff is the toughest stuff you will ever use. Don't get it on your skin because the only way off is for it to wear off. Very pricey, 35.00 a quart 10 years ago. I have no idea what it is now. Used a lot on high end undercarriages.
 
I did purchase the por starter kit
I sm concerned abouy using on underside of floor pans because it sounds like I cannot undo it after it's done any concerns on using por on the underside of floor pans?
Joel
 
Original owner and didn't order with a Posi? I'm guessing it was already on the lot.
Yup,one of the last ones to be found in my area at the time! (Bought it December 14th 1987!) I was in a deal for one with T tops, factory alarm and Posi rear ( at least I didn't get the leaky squeaky T tops and failure prone alarm. Bonus with open rear... I got the Aluminum brake drums! ) but it was too much $$. Hey, I was in the Navy making 900$ a month!

An Auburn Posi was one of the first upgrades I made on the car.
 
I use "A Must For Rust", from Home Depot. 1 qt spray bottle will do the entire underside, axle, etc. Basically, it's the same as Ospho w/o the hi price tag. Last bottle was about $8.00.
The key to any rust killer working, is the part being grease free.
As for POR...it's not designed to work on:
Any painted surface.
On clean metal.
It is not UV proof, either.
 
I did purchase the por starter kit
I sm concerned abouy using on underside of floor pans because it sounds like I cannot undo it after it's done any concerns on using por on the underside of floor pans?
Joel
No problem using it on the floor pans. I have had the underside painted with POR 15 for over 12 years and 75,000 miles and there is not a single problem, still looks great and not so much as a chip. Stops all rust dead in it's tracks.
 
No problem using it on the floor pans. I have had the underside painted with POR 15 for over 12 years and 75,000 miles and there is not a single problem, still looks great and not so much as a chip. Stops all rust dead in it's tracks.
I am not sure how I argue with the statement above?? Not that we are here to argue of course.
I really want to seal up the thin metal floor pans so I don't have to worry. Frame rails will also get treated but my immediate worry is the floor pans. They have a little bit of scale that I want to stop in their tracks. The car will not see rain or the like, but still want to be safe. Wish metal did not rust.
 
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