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-   -   roof skin replacement (galvy spray?) (https://67-72chevytrucks.com/vboard/showthread.php?t=683695)

chico68 09-28-2015 08:57 PM

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.

special-K 09-29-2015 07:36 AM

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

drewbert41 09-29-2015 09:28 AM

Re: roof skin replacement (galvy spray?)
 
Quote:

Originally Posted by chico68 (Post 7323107)
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?

cooperhw 09-29-2015 09:45 AM

Re: roof skin replacement (galvy spray?)
 
Quote:

Originally Posted by chico68 (Post 7323107)
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?

chico68 09-29-2015 06:06 PM

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.

Taibo 09-29-2015 07:34 PM

Re: roof skin replacement (galvy spray?)
 
Quote:

Originally Posted by chico68 (Post 7323107)
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!

hugger6933 09-29-2015 07:54 PM

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

swamp rat 09-30-2015 12:31 AM

Re: roof skin replacement (galvy spray?)
 
Weldable primer maybe?

Clavo106 09-30-2015 12:52 AM

Re: roof skin replacement (galvy spray?)
 
Quote:

Originally Posted by hugger6933 (Post 7324187)
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

X2 ^ / DO WHAT THIS MAN SAYS :metal:

hugger6933 09-30-2015 07:09 AM

Re: roof skin replacement (galvy spray?)
 
Tell that to my wife and kids. Just kidding:lol:

special-K 09-30-2015 07:26 AM

Re: roof skin replacement (galvy spray?)
 
Quote:

Originally Posted by special-K (Post 7323488)
.....There is a weld through primer you could use in welded areas

Quote:

Originally Posted by hugger6933 (Post 7324187)
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

Quote:

Originally Posted by swamp rat (Post 7324533)
Weldable primer maybe?

Quote:

Originally Posted by Clavo106 (Post 7324546)
X2 ^ / DO WHAT THIS MAN SAYS :metal:

X4 ^ / YEAH! DO WHAT HE SAYS :lol:

swamp rat 09-30-2015 09:29 AM

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.

Shaky 09-30-2015 11:24 AM

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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