Roughen both mating surfaces with 100 grit or so, clean with 91% isopropyl, bond with proseal. Fill any gaps with proseal. Sand then prime. My big eyeball vents are supported by NACA ducts and holding up good.
Try to keep any silicone based sealants away from your plane before paint.
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Good judgment comes from experience, and a lot of that comes from bad judgment.
Last edited by Wayne Gillispie : 12-17-2012 at 06:02 PM.
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