I ended up using the 1/2 inch pink to get a surface of exact thickness. A series of lines scribed parallel with the spars. Then they were gently bent to airfoil contour as they got a small dab of hot melt to hold them temporarily in place. The inside contour was perfectly smooth and required no further work before installation of fiberglass. The scribed lines on the outer surface got filled with a semi-thick micro and left to dry. Later sanded the micro even with the surface and what resulted was a thinker version of Dan Diehl's wing skins except they were the new airfoil and needed very little sanding at all. One note though epoxy resin only, don't ask! Works excellent if you have a few false ribs installed so that the washout is easier to achieve. Doug
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