Tried it with a couple of pieces of cardstock last night - the wax paper peels off just fine. Actually, what I am experimenting with is whether or not CA soaked cardstock can be substituted for G10 as a lightweight fin material. Not having any G10 to play with, I'm just winging this here. One layer of 110# cardstock dries nice and smooth and flat and is about .011" thick. It is very flexible though - I'm afraid it might flutter too much as a fin. Two layers of 110" card is about .022 to .023" thick and is quite stiff. I'm going to try 67# stock next and see what two layers of that do. I just used the CA to stick the two halves of the fin together then coated the outside.
My next question is: just how flexible is .010" G10?
Greg;
Short answer is not much at all. lately i've been using .005" Waferglass or (G10) for most competition model fins. Both are pretty much the same thing composition and mass wise. Only real difference i've noticed is the former is sort of a milky clear, while the G10 is yellow to light green transluscent.
My suggestion would be to pickup a sheet or two to experiment with. The precision Garolite (G10) i've been using lately is from McMaster-Carr. .005" #1331T23 and .010" #1331T25. Each 12" x 12" sheet runs 9.18 and 9.77 each. and is available in 24" x 36" sheets as well, that take the Sq in price down a couple cents

For competition model fins, particularly the sizes we're concerned with here, mass really isn't the most important factor. Thinness and span rigidity are as you know what we're looking for. You might want to trade off a couple hundredths of a gram in mass to pickup span rigidity with some allowance for material flexiblilty before failure.
Because Dried CA does not flex at all, but Cracks under such stress I'd be very skeptical of using it as a Stiffener on just about anything for very thin fins. Silk or superthin fibreglass cloth might be exceptions. While CA soaked cardstock makes a pretty darn good airdried phenolic composite, it really has little strength in repeated flex area applications.
Ps: both Waferglass and G10 take magic markers pretty well for Coloring

Hope this helps a little.