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Old 08-16-2015, 02:38 PM   #1
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Question Fender vents - how to make a mould for fiberglass?

Hi guys,
I'm not Miata owner, however I really like local discussion about aero upgrades.
My goal is to make a fiberglass fender vents for RX-8 (not complete fender, just a small panel with vents to be bolted on original fender). Problem is that the fender is curved in both directions and I don't know how to make (which material) individual vents, so I can make a mould.
So far I tried wooden bar (not bendable to match curvature) and aluminium sheet (not stiff enough for mould). See the pictures and video.

Any ideas how to make individual vents (on original fender), so I can make a mould from it?

<iframe width="560" height="315" src="https://www.youtube.com/embed/krEhfpMHY1Y" frameborder="0" allowfullscreen></iframe>




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Fender vents - how to make a mould for fiberglass?-obr_zek_1.jpg   Fender vents - how to make a mould for fiberglass?-obr_zek_2.jpg   Fender vents - how to make a mould for fiberglass?-fhcp65_xf23_z3_b3_q_large.jpg  
DaveMax is offline   Reply With Quote
Old 08-16-2015, 07:21 PM   #2
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Whenever I'm fabricating something I use cardstock to make my templates first. It's easy to work with, cheap, and sturdy.
Cut a strip longer than you anticipate it being (account for the end folds too), then, with scissors, start trimming it until it fits like you want it to. Make all your vents. Make a suitable platform for them to rest on that will hold them in the right shape (still out of that cardstock), use spray adhesive and aluminum foil to cover the vents. Apply release compound to the mold, then begin applying your fibreglass. This can either be the final product, or the mold you make your real vents out of.
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Old 08-16-2015, 07:41 PM   #3
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Like what this guy did, but the forums died out and no one updates it anymore







Im going to work on my fender vents with aluminium, even tho I work on fiberglass on a daily basis at work.



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Fender vents - how to make a mould for fiberglass?-34660197_zpsq26ki2ie.jpg   Fender vents - how to make a mould for fiberglass?-22944518_zps3i1esdhl.jpg   Fender vents - how to make a mould for fiberglass?-92842791_zps0nc9yfeh.jpg   Fender vents - how to make a mould for fiberglass?-dscn4536_zps3khnritg.jpg   Fender vents - how to make a mould for fiberglass?-a062cbd8-5355-4e05-8899-41902f0b76ec_zpscecd0m8o.jpg  

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