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Old 07-26-2018, 11:34 PM
rkolenda rkolenda is offline
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Default Benz hood fabrication

I have been restoring a 1956 Mercedes 300 Sl at the shop.I thought that I had all the metal work done until we stripped the hood and found that it had some old poorly done repairs. There was no saving it .The only solution was to fabricate a new skin. the basic hood shape was fairly easy . The only difficultly was the two 5 foot long hood bubble details.The plan was to make a concrete reinforced fiberglass hammer form to flow form the bubble details into the aluminum skin once the basic blank was formed.Fortunately I have access to another car that I could use for making patterns and a fiberglass buck.The hood was on a finished painted car so we had to be carefull not to scratch or damage it.We taped off all the edges and underside to protect it.We then waxed it with mold release and layer of PVA. water soluble mold release to get a clean release.Name:  IMG_0160.jpg
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We sprayed down some tooling gell coat
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Followed with a few layers of cloth and resin
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After a bit of water the casting came off clean with no damage to the loaner hood
Name:  IMG_0988.jpg
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Size:  38.6 KB. More to follow.
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Old 07-27-2018, 12:00 AM
longyard longyard is offline
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Thanks Robert. I'll be interested to follow your process.
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Old 07-27-2018, 07:46 AM
rustreapers rustreapers is offline
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Default Tool Gel??

What is the tool gel coat? Is it regular gel coating or a specialty type designed to resist the impact from flow forming?
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Old 07-27-2018, 09:20 AM
rkolenda rkolenda is offline
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Tooling gell coat is generally used when making fiberglass molds.It is more scratch and impact resistant.It was chosen because we would be hammering directly on it.You can find it at any fiberglass supplier.The supplier I like is www.uscomposites.com.
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Old 07-27-2018, 10:18 AM
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RockHillWill RockHillWill is offline
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I can't wait to see this project as it gets accomplished. Thanks for posting Bob.
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Old 07-27-2018, 06:02 PM
cliffrod cliffrod is offline
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I'm very much looking forward to what you do and how you do it, Rob. Like Will said, thanks for posting.
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Old 07-27-2018, 07:11 PM
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Steve Hamilton Steve Hamilton is offline
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Hi Bob

Thanks for posting your progress on the hood. I know you are very fussy and careful, but that must have been kinda scary, to use that very expensive hood to make your mold!!!

Will be fun to watch the progress.

Steve
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Old 07-27-2018, 07:22 PM
pistol pistol is offline
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Looking forward to seeing this
cheers paul
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Old 07-27-2018, 07:30 PM
crystallographic crystallographic is offline
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Was going to ask if you were using tooling f'glas.
Lessee how this goes ...
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Old 07-28-2018, 11:01 AM
mastuart mastuart is offline
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Hi bob. I assume you will be making a clamping plate. I also assume the ridges will be hammered in like we did for the hood blister on my Daytona coupe hood at MM.

Mark
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