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Old 04-03-2005, 09:02 PM
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Fiberglass Dash Help

Hi, I'm doing my first fiberglass project which happens to be my dash for a 1971 Chevelle. The problem is that I do not know which material i could use to make my mold (male mold). I tried this spray foam from home depot called Great Stuff in hopes of being able to shape the foam but the foam began to sag and curl up after a week. Also a major issue is that the dash i designed flows into the door panels like a dash i saw by rad rides and im not sure what materials i can use to make this mold work so that I can begin fiberglassing and have my dash line up perfectly with my doorpanels. ANY help is greatly appreciated.

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Old 04-03-2005, 09:13 PM
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You have to use a foam that will not be attacked by the polyester resin you are using. I think polyethelene foam is what you want...I think. Or you could use regular polystrene foam and make a mold with glass cloth and epoxy resin instead of polyester.

Vince
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Old 04-03-2005, 09:23 PM
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Thanks, where can i find these foams?
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Old 04-03-2005, 11:09 PM
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Fiberglass fab.

I've built many fiberglass parts and have found a company that has everything you'll need for your project. The company name is Tap Plastics. Check them out at Tap Plastics.com they have books and many things that can help you with future projects. Good luck with your project, jhenery
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Old 04-04-2005, 01:21 AM
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Mold plugs

On something like that make a mockup dash out of pine which can be carved to fit the space required..the door panel plugs can be made from pine as well..use thin ply as a backing..using the wood makes a much more stable plug to work from..

Once you have the mold plug made to suit..glass it and spray it with black gel coat and then take a mold from the plug..The final part will be made in the mold..

Any imperfections or lack of fit in the plug will show up in the final product so take your time..Remember to use mold release wax in order to get your parts out of the mold..

Good luck

OMT
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Old 04-04-2005, 07:29 PM
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Thanks a lot for the info guys. Any other tips anyone else may have can only help me. Also wut may be a god way to build up the frame for the mold so that it holds the dash mold in place and also takes up sum of the space behind the mold so as not to waste materials in areas that wont be needed anyways?
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