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Old 27-03-2016, 08:07   #1
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Fairing Compound vs. Thickened Epoxy on Lead

During my Spring Recon evaluations, I discovered the fairing material on the bottom of my wing keel has delaminated from the lead along the centerline. It appears to be Interlux and is approximately 1/8" thick. The bottom of the keel is fair without any noticeable voids. It appears that when the keel was blocked in the Fall, it hastened the failure. I am going to grind the existing fairing compound back to the point of good adhesion on the lead (I don't want to remove the entire bottom of the keel), abrade the exposed lead with a coarse grinding disc and coat with West epoxy resin and work into the lead surface with 80-100 grit emery paper. After that, I will build several barrier coats, a tie coat and then paint. Am I missing any steps? Any obvious inherent problems? Thanks, Rognvald

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Old 27-03-2016, 12:32   #2
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Re: Fairing Compound vs. Thickened Epoxy on Lead

Add some 404 high density filler. It has additional adhesive properties.

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Old 27-03-2016, 13:06   #3
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Re: Fairing Compound vs. Thickened Epoxy on Lead

Any added filler is going to be damaged from blocking. I'd fair the lead, then apply many coats of straight WEST epoxy, not allowing them to dry completely, and apply the paint directly to the uncured epoxy.
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Old 27-03-2016, 13:22   #4
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Re: Fairing Compound vs. Thickened Epoxy on Lead

404 High Density Filler is marble dust.
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Old 27-03-2016, 13:24   #5
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Re: Fairing Compound vs. Thickened Epoxy on Lead

Yeah, why refill? Bare lead and paint.
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