Bill

I don't have a lot for you. It's been many years sense I used the carbon matt. My guess is the buckling (warping) was due to the water base poly. I had it happen on ailerons and a bit on thin wings. The way I stopped it was to put a coat of poly on both sides of the surface and put some weight on them for a few hours. In fact, that's the reason I moved over to bedding the silkspan with lacquer. Once I started doing that I eliminated the warping issues.

From what I can recall, I do remember a bit of the delaminating of the carbon matt, but nothing significant.