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Old 09-28-2015, 08:57 PM   #1
chico68
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roof skin replacement (galvy spray?)

I am preparing to do an inner and outer roof skin replacement, I have sand blasted these parts and was wondering if anyone has tried the galvy spray that's out there. I would like to coat the panels before welding them up as to give them a lot better protection than the factory did (bare steel). I will use weld through primer at the weld areas, but need some feedback on the galvy spray. Thanks Rob P.
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Old 09-29-2015, 07:36 AM   #2
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Re: roof skin replacement (galvy spray?)

I have used that. I don't know what is galvanized about it, but welding galvanized is bad news. It will burn/melt where you weld. There is a weld through primer you could use in welded areas
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Old 09-29-2015, 09:28 AM   #3
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Re: roof skin replacement (galvy spray?)

Quote:
Originally Posted by chico68 View Post
I am preparing to do an inner and outer roof skin replacement, I have sand blasted these parts and was wondering if anyone has tried the galvy spray that's out there. I would like to coat the panels before welding them up as to give them a lot better protection than the factory did (bare steel). I will use weld through primer at the weld areas, but need some feedback on the galvy spray. Thanks Rob P.
You have any pics of the inner/outer removal?
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Old 09-29-2015, 09:45 AM   #4
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Re: roof skin replacement (galvy spray?)

Quote:
Originally Posted by chico68 View Post
I am preparing to do an inner and outer roof skin replacement, I have sand blasted these parts and was wondering if anyone has tried the galvy spray that's out there. I would like to coat the panels before welding them up as to give them a lot better protection than the factory did (bare steel). I will use weld through primer at the weld areas, but need some feedback on the galvy spray. Thanks Rob P.
How many hours and cost do you think you will have in this inner/outer roof panel replacement. Just wondering. I also had this to do on my 68, including the back of the cab as it was a converted motor home from new. I figure I had about $500 and about 40 hours into the repair. Just wondering how that compares?
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Old 09-29-2015, 06:06 PM   #5
chico68
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Re: roof skin replacement (galvy spray?)

I have a couple of pics of the donor roof pieces after I drilled out all the spot welds and separated them, and there are MANY spot welds. I will try to post these and any future pics from the roof project. Well cost wise the donor roof cost $50 from a salvage yard just sawzalled it right off. Time into this so far 5 to 10 min. to cut it off, 1 and 1/2 hours to drill out spot welds and separate the pieces, sandblasting the skins 30 to 45 min. I got lucky I found a donor roof with decent inner and outer skins, they will need some work but at least I have the complete inner skin, since they don't press that complete panel yet.
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Old 09-29-2015, 07:34 PM   #6
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Re: roof skin replacement (galvy spray?)

Quote:
Originally Posted by chico68 View Post
I am preparing to do an inner and outer roof skin replacement, I have sand blasted these parts and was wondering if anyone has tried the galvy spray that's out there. I would like to coat the panels before welding them up as to give them a lot better protection than the factory did (bare steel). I will use weld through primer at the weld areas, but need some feedback on the galvy spray. Thanks Rob P.
That galvanized spray contains a lead compound. Not only will it contaminate your welds but it will give off very toxic fumes when you get it hot and lead poisioning is a cumulative poison. It never leaves your body, but if you are serious about trying for a "Darwin Award" have at it!
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Old 09-29-2015, 07:54 PM   #7
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Re: roof skin replacement (galvy spray?)

Why not just use some thing say paint? Use weld through about 3 inches pat the pinch welds should be plenty then paint the rest spray can or anything is better than what the General did[nothing]. Jim
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Old 09-30-2015, 12:31 AM   #8
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Re: roof skin replacement (galvy spray?)

Weldable primer maybe?
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Old 09-30-2015, 12:52 AM   #9
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Re: roof skin replacement (galvy spray?)

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Why not just use some thing say paint? Use weld through about 3 inches pat the pinch welds should be plenty then paint the rest spray can or anything is better than what the General did[nothing]. Jim
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Old 09-30-2015, 07:09 AM   #10
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Re: roof skin replacement (galvy spray?)

Tell that to my wife and kids. Just kidding
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Old 09-30-2015, 07:26 AM   #11
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Re: roof skin replacement (galvy spray?)

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.....There is a weld through primer you could use in welded areas
Quote:
Originally Posted by hugger6933 View Post
Why not just use some thing say paint? Use weld through about 3 inches pat the pinch welds should be plenty then paint the rest spray can or anything is better than what the General did[nothing]. Jim
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Originally Posted by swamp rat View Post
Weldable primer maybe?
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Originally Posted by Clavo106 View Post
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__________________
"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed"

GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project)
GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling)
Tim

"Don't call me a redneck. I'm a rough cut country gentleman"

R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~
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Old 09-30-2015, 09:29 AM   #12
swamp rat
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Re: roof skin replacement (galvy spray?)

Eastwood also has a couple products designed to spray into crevasses, its in an aerosol can and has an 18" hose with a nozzle, i believe one is for inclosed frames, the other is for body but ether would work to reach into areas after your done welding.
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Swamp Rat build thread :
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72 3/4T 4X4
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Old 09-30-2015, 11:24 AM   #13
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Re: roof skin replacement (galvy spray?)

We used glue for a good portion of mine. Check the C20 thread in my sigline.
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