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Old 04-26-2006, 08:14 AM
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How to seal inside rockers

I'm in the process of restoring a 69 LeMans. I have patched the rocker panel on the drivers side in two places (outer rocker) and need a small patch on the inner rocker before I replace the floor pan supports.

I want to spray some master series epoxy primer inside the rockers after I'm done patching. I have a small undercoating system from Eastwood I used for my boxed frame rails but had to really thin out the material to get it flowing right.

Is there a better way to get sealer into tight spaces such as the rockers or inside boxed frame rails?

Thx...Kron
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Old 04-26-2006, 08:19 AM
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There is a product called "cavity wax" that you apply to the inside of any welded on parts like a rocker or frame rail on a unibody car. It is applied with a long plastic tube that has a nozzle on the end.

3M makes one called Rust Fighter part number 8891.

Brian
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Old 04-26-2006, 09:00 AM
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agree, cavity wax is as good as it can be

of course, the challenge is.....flushing the 40 years of crap out that's in there so the wax can stick better to the rust scale

sharp hammer blows...forced air....gets the loose stuff...welding loosened some already

Brian, your gona love my "mud" solution.......
mix 10 different soaps and detergents in your hose end insecticide sprayer, spray hell out of it, tape the front drains,spray more in, trap as much as you can, let it soak, then rinse and blow dry, if you can drive the car, seal the rear drain go slosh the soap and water around.....your car is now a washing machine

what kills rockers is every time you use reverse the rear tires throw the crap and water into the rear rocker drain, do what you can to "shield" them but don't(!) close them up...the faster steel can dry with air flow the longer it will last
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Old 04-26-2006, 11:46 AM
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Thanks. I've never heard of this product. Will cavity wax seal surface rust inside the rocker or will that have to be "neutralized" first? They have been cleaned (blown down).

Kron
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Old 04-26-2006, 12:13 PM
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ooooooooh noooooo! don't ask that question!!!! I can "feel" a 100 posts thread coming!!!!

seriously, just click on the knowledge base link above and enter "rust" in the search box in the body exterior section

how's this for an answer: won't really help, won't really hurt, anything...
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Old 04-26-2006, 12:45 PM
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Will do.

Thx again...Kron
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Old 04-26-2006, 07:53 PM
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Old Jag Trick

Don't know if this will work for you, but....

On the old E-Type jags, the frame rails were hollow and tended to rust from the onside out so the fix was to drill a hole on the top of the rail , dump a quatr of oil in there, plug the hole and drive like a madman around an empty parking lot on a Sunday morning to slosh it around really well.

Don't know if it did any good but it shure was fun.
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Old 04-26-2006, 09:16 PM
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Quote:
Originally Posted by Kron
Thanks. I've never heard of this product. Will cavity wax seal surface rust inside the rocker or will that have to be "neutralized" first? They have been cleaned (blown down).

Kron
Kron, the cavity wax will attach itself and seep into the surface rusted panels, it provides a self healling barrier to keep moisture, oxygen from feeding the rust. A coating like POR would also be good but it would be impossible to prep and clean these interior surfaces for a good application. a few applications of 3M's rustfighter, or Transtar's Amber Coating, or Amsoil's version will work well. Tape the lower pinchweld closed so this seam fills up completely and make sure the drains in the inner rocker are open when you are done.

I agree on Red's idea about dirt/mud being the major cause of corrosion in these areas. Dust collects in these areas and eventually holds moisture causing corrosion. Dust will actually wick moisture into crevices like a sponge. Bob
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Old 04-27-2006, 04:05 AM
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Baddbob, well put, "self healing" great description

all I could think of was candle wax on a table......not a correct description
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Old 04-27-2006, 04:37 AM
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deleted, doesn't apply to this car

Last edited by red65mustang; 04-27-2006 at 10:51 AM.
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Old 04-27-2006, 08:08 AM
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I'm sorry Red, but a half inch angle is going to do very close to nothing for you in that applicaton.

Either you repair the rockers damage or you do nothing, a little strip of metal isn't going to help you.

The 69 LeMans is a full frame car, the rockers are no different convertible to hardtop because they aren't doing as much as on a unibody convert.

Brian
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Old 04-27-2006, 09:05 AM
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Brian, do agree,
I'm having one of those "my brain is not plugged in at all days"

went back and deleted post

Last edited by red65mustang; 04-27-2006 at 10:50 AM.
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Old 04-27-2006, 11:04 AM
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The full frame GM cars like the 69 LeMans had boxed frames where the sedans and hardtops had open channel frames. I think the Ford and Chrysler uni-body cars had extra "boxes" welded to the floor pans in strategic areas for the convertibles.
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Old 04-27-2006, 11:10 AM
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You are right (sort of, but we will get to that in my PS ) my point was that the rockers are no different sedan to conv.

Brian

PS Hows this for a trivia question: There is a GM "A" body that did have a boxed frame in the sedans and coupes 1965-66, which one?

There was actually two, I'll give you one, but there were only about four made, the other was production. The 65 Chevelle I think it was called a "Z16" that had a boxed frame with a coupe. What was the other?
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Old 04-27-2006, 05:43 PM
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I was rushing at lunch. I should have added that the factories kept the convertibles from folding up by means other than reinforcing the rockers. The rockers were the same.

I am going to guess. I know the GTO and Chevelles (save the Z16's) had open channel frames. The 442?
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