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Lester Populaire - 7/1/2019 5:16:16 PM

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lovethepirk - 7/1/2019 6:16:22 AM

I'm doing a wing mold from a carefully smoothed 3d printed plug and 3d printed flange. Although the geometry is not that complex, I am doing a test piece right now b/c I am a rookie.

The issue I am having with the test piece is I don't like how the 6.75oz / 228 gram chopped strand fiberglass is following the contour in the below picture. I have read somewhere where I can build up that area with extra gelcoat to make that area not as drastic.

I'm wondering if a better way to go would be to start off with twill fiberglass so I can get the contour perfectly without the risk of the chopped strand pulling from that tight curve or if I should stick with chopped strand.  I'm planning on making a rigid mold so I'm considering tossing in layers of twill and also maybe even leftover carbon fiber twill.  Any suggestions on building up that area with extra gelcoat or skipping or not skipping the chopped strand is helpful.  Thank you.

I usually fill this kind of corners with resin and short glass fibers (a filler you can buy like this). You mix in as much fibers as needed to get a thick paste and then continue wet in wet with chopped strand mat. And as Warren said i would really suggest to start with a lighter matt or fabric as first layer after the gel coat to avoid print through.