Undercoat

For those who obsess about exactly how their 356 left the factory!
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Nathan Ward
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Undercoat

#1 Post by Nathan Ward » Mon Sep 05, 2011 2:20 am

Hi, Is there a modern undercoat product that people are using for concours restorations?

Edwin Edwin
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Re: Undercoat

#2 Post by Edwin Edwin » Mon Sep 05, 2011 11:58 am

Hi, I've had great results with 3M 8868. Apply a second coat 2k satin laquer.
http://www.porsche356forum.eu/viewtopic.php?f=28&t=1810

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Jim Liberty
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Re: Undercoat

#3 Post by Jim Liberty » Tue Sep 06, 2011 8:56 pm

I start with a coat of NEVERRUST rolled and sprayed, then I use Wurth Shutz. Then a coat of RUST OLEUM semi-gloss, rolled and sprayed. If that is show quality, it is up for debate.
Most of us have pet products we like. Our attention to detail and use of multiple steps is far more carefully done than at the factroy. These cars were built for driving and profit for Porsche. Not for the concours circuit.

That said, it is a lot of fun doing it our way. .....................................Jim.
Jim Liberty

Mark Tirpak
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Re: Undercoat

#4 Post by Mark Tirpak » Wed Sep 07, 2011 7:41 am

Jim Liberty wrote:I start with a coat of NEVERRUST rolled and sprayed, then I use Wurth Shutz. Then a coat of RUST OLEUM semi-gloss, rolled and sprayed. If that is show quality, it is up for debate.
Most of us have pet products we like. Our attention to detail and use of multiple steps is far more carefully done than at the factroy. These cars were built for driving and profit for Porsche. Not for the concours circuit.

That said, it is a lot of fun doing it our way. .....................................Jim.

Touche Mr. Liberty!

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Alain Buchert
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Re: Undercoat

#5 Post by Alain Buchert » Wed Sep 07, 2011 9:26 am

I got a execelent result with the product Wurth. "Underbody Seal"
https://shoponline.wurthusa.com/wurthus ... od=4238843
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356 BT 5 super75 1961

Etienne Kerkhoffs
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Re: Undercoat

#6 Post by Etienne Kerkhoffs » Thu Sep 08, 2011 5:19 pm

I have used the Wurth as well, followed by a layer of 2k 50% gloss black paint.
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Etienne Kerkhoffs
1958 356A T2 Sunroof Coupe

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Steve Harrison
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Re: Undercoat

#7 Post by Steve Harrison » Sat Sep 10, 2011 9:58 pm

You want the real thing? Roofing tar,..diluted with paint thinner so it will spray.
Use an undercoating or rustproofing gun,..one with a big orifice. You can get it from Eastwood And if you want to go Pre A original,...mix in some mica mineral flakes. For a Pre A put it on Thick.
Then after it's set a bit and the solvents have evaporated...go back with a propane torch and hit some wide spots to try to get it to "sag" if it hasn't done so on application...just like factory original.

I know of some serious concours cars that have been done this way.

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Graham Kidd
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Re: Undercoat

#8 Post by Graham Kidd » Mon Sep 12, 2011 3:27 pm

https://shoponline.wurthusa.com/wurthus ... group.jsp/

Never used anything else on over 200 shells!

Bruce Baker
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Re: Undercoat

#9 Post by Bruce Baker » Wed Sep 14, 2011 9:47 am

Ditto on Graham's posting....and 3M Body Schutz on 200 before that. :wink:

"Back in the day" (on yet another 200 or whatever...I've lost count :? ) we used commercial asphaltic undercoat cut with lacquer paint left-overs that when mixed together made a sort of black, as thinner, a-la Steve's posting.

Like the clean-up of waterborne! However, the cost may be a little salty for one-timers. The gun pictured below costs about as much as one of Vic's lesser Lugers and the SKS is about $30/liter and we average a case (12 liters) per 356.
Jackson sent 9-2-11 spraying Wurth SKS texture coating.JPG
For fun, Google "Vibrant Curiosity," Herr Wurth's boat. Hey, his Vater und Grossvater sold hardware to German coachbuilders and likely there is some on our 356s.
http://elitechoice.org/2009/04/03/rein- ... curiosity/
http://www.flickr.com/photos/oenilsen/3542234116/
http://yachts.monacoeye.com/files/ocean ... iosity.php

In the '60s, we were 'repairing' and not 'restoring.' We were blending texture into original, as most cars back then were 'original' in all aspects. I have heel marks in my butt from kicking myself most days for not taking better notes and more pictures of that rapidly fading resource.....but back then, who knew where all this was going?
 

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Alain Buchert
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Re: Undercoat

#10 Post by Alain Buchert » Thu Sep 15, 2011 7:57 am

Here are my bottom with the product Wurth.
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I do not see the boat, But for my job I contributed to the realization of a building.
The man also has a fine collection of art paintings
http://www.musee-wurth.fr/en/secondaire ... index.html

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Bruce Baker
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Re: Undercoat

#11 Post by Bruce Baker » Wed Sep 21, 2011 8:59 am

Alain Buchert wrote: But for my job I contributed to the realization of a building.
The man also has a fine collection of art paintings
http://www.musee-wurth.fr/en/secondaire ... index.html
Interesting work by Anselm. Thank you, Alain, for sharing...and especially for the English language version of the museum website.
 

Mark Erbesfield
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Re: Undercoat

#12 Post by Mark Erbesfield » Sun Jan 08, 2012 9:39 pm

I see some guys shoot the Schutz before final color and some after. Let me hear some opinions please on both ways. Thanks
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Sebastian Gaeta
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Re: Undercoat

#13 Post by Sebastian Gaeta » Sun Jan 08, 2012 11:29 pm

The fully documented, one owner unmolested Ruby Red '58 coupe in Neil's book had overspray from the Reutter paintbooth on the undercoating:
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IMG_0251webshot.jpg
DSC06085webshot.jpg
Sebastian Gaeta
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1998 Boxster
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1963 Beetle

Mark Erbesfield
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Re: Undercoat

#14 Post by Mark Erbesfield » Mon Jan 09, 2012 9:25 am

Sebastian Gaeta wrote:The fully documented, one owner unmolested Ruby Red '58 coupe in Neil's book had overspray from the Reutter paintbooth on the undercoating:
I was not meaning for originality reasons, I was meaning for simplicity of restoration etc. It may be the way they did it at the factory, but I don't think I could bring myself to allow overspray to go all over my nice fresh Schutz.
57 356A
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73 911S
66 Land Cruiser FJ45LV
71 Land Cruiser FJ40
79 450 SL

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Sebastian Gaeta
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Re: Undercoat

#15 Post by Sebastian Gaeta » Mon Jan 09, 2012 9:54 am

Mark Erbesfield wrote:I was not meaning for originality reasons, I was meaning for simplicity of restoration etc. It may be the way they did it at the factory, but I don't think I could bring myself to allow overspray to go all over my nice fresh Schutz.

I don't blame you at all for not wanting the overspray!! This just shows that the factory did the undercoat first for whatever that is worth.

It is intersting to note that Reutter then brush painted black paint over their overspray. Prehaps they were more worried about undercoat on fresh paint and not vice versa.

Regards,
Sebastian Gaeta
www.arbormotion.com

Registry #8339

'65 C coupe
'64 C cab
--------
2001 996 C4
1998 Boxster
1967 Karmann Ghia Convertible
1966 Ducati Cafe Racer
1963 Beetle

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