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Unread 01-08-2012, 02:00 PM   #1
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1985 CJ7 
Join Date: Dec 2010
Location: prosperity, sc
Posts: 249
killing rust?

i have been repairing the rusted out spots on my 85 cj7. basicly at all rollbar bolt points and floor pan. a lot of what i am doing is cutting out what the po tacked over the rusty spots. there is also some surface rust and slight pitting in some spots in the tub. should i wirewheel, clean well and prime? also i see advertised rusty metal primer. is this better?

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Unread 01-08-2012, 02:01 PM   #2
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1996 ZJ 
Join Date: Sep 2009
Location: Kingston, Pa. 18704, Pennsylvania
Posts: 3,469
IMO: None of that rust converter stuff works.

The only way to get rid of rust is to cut and weld in new metal and pray that it doesn't eventually come back from the other side where you can't protect the newly welded panel.....
79' CJ7 - 82' CJ8 - 94' YJ - 96' ZJ
Diagonally parked in a parallel universe.......
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Unread 01-08-2012, 02:31 PM   #3
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1981 CJ7 
Join Date: May 2011
Location: Elbert, CO
Posts: 10,110
Well, I wouldn't disagree with Stan the Paint Man, he's got way more experience than I do.

But, I'm currently restoring my tub and I've been using a product called Rust Mort. It's phosphoric acid based and chemically reacts with the rust, turning into a black ferric phosphate, which then can be painted over. I've used it thru-out my tub. It's a clear liquid that you just paint over the rust and let dry.

Almost instantly, it turns the rusted area black. Then, as it dries, it turns a more grayish sheet metal color. Here's a shot of one of my floor pans right after applying the Rust Mort directly over the surface rust. The second pic is after it dried and a light coat of metal glaze was applied.

I can't say how long it will last, but it sure seems to work as advertised, so far.

rustmort.jpg   paintprep12.jpg  
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Unread 01-08-2012, 02:39 PM   #4
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1978 CJ5 
Join Date: Jan 2011
Location: roseburg, oregon
Posts: 28
I agree 100%, my buddies nicknamed my CJ "Rusty Thunder". Needless to say i have tried alot of that crap and the only way to cure it is with sheet metal and a MIG with some .023 wire in it. make sure to primer all the spots you cover up as well. Mine is looking more like "Patch" now but my floors are solid!
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Unread 01-08-2012, 02:40 PM   #5
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1978 CJ5 
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Location: roseburg, oregon
Posts: 28
Agree with Stan the Paint Man that is!
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