ORIGINAL: ChuckW
I agree on the heat gun thing. I also used a heat gun from the hardware store for a while. It had two settings: way too hot or not hot enough. I finally got an actual Hobbico heat gun. The heat guns sold for shrinking covering are the right temperature and work much better, at least for me anyhow.
I'm still using my cheap one from the hardware store. It took a couple of planes to find the right heat setting and distance from the surface before I stopped burning holes in the covering

But now it works great