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Old 07-26-2018, 10:34 PM
rkolenda rkolenda is offline
MetalShaper of the Month Nov. 2009
 
Join Date: May 2009
Location: Rockford,Michigan
Posts: 93
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
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Size:  38.6 KB. More to follow.
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Old 07-26-2018, 11:00 PM
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, 06:46 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, 08:20 AM
rkolenda rkolenda is offline
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Join Date: May 2009
Location: Rockford,Michigan
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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, 09:18 AM
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, 05:02 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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