rust in body seams
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Joined: Nov 2005
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From: Irwinville, GA
rust in body seams
i've been searching the threads for this problem but i can't seem to find anyone who's had it before, so here we go.
i've been doing a lot of rust maintenance lately to prepare the truck for priming and painting and i've run into a problem in the door and door jamb seams. rust has bubbled out from under the seam sealer. i've been knocking out the sealer and using a dremel to grind what rust i can out of the seams.
i'm planning on grinding down as much as i can without compromising the seam, apply a generous coat of rust converter to get the rest, then putting down new beads of seam sealer. is there anything i'm missing? i don't want to have the rust come back at a later date.
on a side note, is there a name for the type of rust that i'm seeing here? it's not surface rust, and it's not rust that has attacked and eaten away the edge of the material. it's the kind of rust that pits onto the surface of the metal and leaves a black, carbon-like deposit than can be chipped away, revealing a pitted surface. it also seems to 'bloom' into a cauliflower-like shape when allowed to grow. i've only seen this kind of rust once before: on 12" fire suppression system valves that stay submerged.
any help would be appreciated.
i've been doing a lot of rust maintenance lately to prepare the truck for priming and painting and i've run into a problem in the door and door jamb seams. rust has bubbled out from under the seam sealer. i've been knocking out the sealer and using a dremel to grind what rust i can out of the seams.
i'm planning on grinding down as much as i can without compromising the seam, apply a generous coat of rust converter to get the rest, then putting down new beads of seam sealer. is there anything i'm missing? i don't want to have the rust come back at a later date.
on a side note, is there a name for the type of rust that i'm seeing here? it's not surface rust, and it's not rust that has attacked and eaten away the edge of the material. it's the kind of rust that pits onto the surface of the metal and leaves a black, carbon-like deposit than can be chipped away, revealing a pitted surface. it also seems to 'bloom' into a cauliflower-like shape when allowed to grow. i've only seen this kind of rust once before: on 12" fire suppression system valves that stay submerged.
any help would be appreciated.
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Joined: Jul 2001
Posts: 432
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From: West London, England
Hi Junker 79
I clean seams out with a spot blasting gun, the type that recycles the grit into a bag beneath the gun. Then hit it with a rust converter
If you can get to the back of the seam then clean and treat that as well
If rust is bubbling up from under the seam sealer I would geuss that moisture is getting in from behind so needs to be sealed
Stephen
I clean seams out with a spot blasting gun, the type that recycles the grit into a bag beneath the gun. Then hit it with a rust converter
If you can get to the back of the seam then clean and treat that as well
If rust is bubbling up from under the seam sealer I would geuss that moisture is getting in from behind so needs to be sealed
Stephen
Last edited by Steve_B; Jan 27, 2006 at 10:35 AM. Reason: spelling
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From: Irwinville, GA
can't remember what brand it is. small (prob about 8oz) bottle. leaves behind a hard, black primer. got it at autozone. it's pretty liquidy, you just brush it on or dab it into harder-to-reach areas.
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From: New Jersey
Originally Posted by preppypyro
And that stuff is able to paint over?
If you put on two coats, you don't have to paint over it either (i.e. on the frame, suspension bracketry, and so forth).
If the rusty bits were really bad, as in flaky rust, you will need to use a filling primer.
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