I'll get right on mixing that stain for you...
We've tried doing the translucent wings in Targetware with 3D settings. To do this, the wings are actually transparent and the 3D model has ribs and spars. The problem is, unless the model has all the correct details it doesn't look 100% realistic.
I usually indicate this with paint, that has problems too but I'm not sure if either solution is perfect. But, as I'm a paint guy, I prefer paint
Here's a few of my paint samples-

Keep in mind, that PC10 dope is pretty damn opaque, I doubt any light would get through it. It's almost incorrect to call it dope, it's really pigment and dope mixed together, kind of a dope/paint hybrid.
The natural clear dope or varnished fabric is pretty transparent with light behind it though. With natural fabric you'll always see a little ghosting of what is behind it I think.