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Old Jan 02, 2009, 09:01 PM
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The 'Wack, BC, Canada
Joined Oct 2002
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Polyester resin will also eat foam if you want to do a lost foam cowl or other shape. For that application epoxy laminating resin is the only way to go.

The strength in the part should come from the density of the fiber and not the type of resin used. Having said that polyester is more brittle as noted by Pinecone so you need to be more attentive to the layup around mounting points.

Both resins are very fuel proof. If you use the polyester be sure to use the unwaxed style resin or you'll have a tough time getting paint to stick to it later on.
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