After too many instances of mysterious "hanger rash" I changed to silk. It is a new learning curve and a bit of a pain. The largest is that it takes (at least for me) about 10 coats of dope to get nice and tight and wrinkle free. The upside is that it is super strong. I have (confession coming up) crashed a number of times and the silk, to this point, has absolutely saved the wing. Strong, strong, strong.
The other downside is that with that many coats of dope, the wing can sometimes "warp" while the dope tightens. I microwave some wet towels, throw them on the warp (which I have clamped in the desired de-warped position) and let it sit while the towels cool. The towels go over the multi dope finish with no ill effects. Warp gone, nice strong finish.