The Murphy Builders Site

Hi Rich !

Many builders don't put anything on the flapperons -
get good adhesion with the Polyfiber Poly-Tack on bare
aluminum. Other parts <could> be coated with a light
coat of PolyFiber EP-430 - the FACTORY APPROVED
corrosion proofer ....

With the 6061-T6 used on the Rebel, you really
don't need to worry about corrosion proofing on the
flapperons - just be sure to put drain holes on the
bottom, next to each rib.

--
......bobp
http://www.prosumers.ca
http://bpatterson.qhealthbeauty.com
http://apatterson2.qhealthzone.com
http://apatterson2.ordermygift.com

-------------------------------orig.-------------------------
On Saturday 10 November 2007 00:34, Rich Dodson wrote:

Hi Guys!

So I built Flaperon number one, and I carefully applied AFS Waterborne Poly
Primer/Sealer to it as a preservative coating. And despite the claim from
the AFS factory that it was compatible with fabric coating systems, I wiped
a little MEK on it as a test and it...failed. Came right off. Bummer!

I am told that, because fabric glue uses MEK as a thinner, AFS is a
non-starter now. So, what to do?

Obviously, I can take off the coating on the flanges and skin that will
touch fabric glue. What do I put on those surfaces? Zinc chromate? Two
part Poly from Dupont? Nothing?

What do I coat the other three frames with?

Thanks!
Rich

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The poly fiber covering manual is pretty clear that it must be EP430
epoxy primer.
I figured primer was a good idea considering the concern expressed about
water and condensation drains.
Ken

Rich Dodson wrote:

Hi Guys!

So I built Flaperon number one, and I carefully applied AFS Waterborne Poly Primer/Sealer to it as a preservative coating. And despite the claim from the AFS factory that it was compatible with fabric coating systems, I wiped a little MEK on it as a test and it...failed. Came right off. Bummer!

I am told that, because fabric glue uses MEK as a thinner, AFS is a non-starter now. So, what to do?

Obviously, I can take off the coating on the flanges and skin that will touch fabric glue. What do I put on those surfaces? Zinc chromate? Two part Poly from Dupont? Nothing?

What do I coat the other three frames with?

Thanks!
Rich

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