I just dug out my old Vietnam-era mil-surplus poncho. It was dusty and filthy, so I decided to wash it. I discovered that the waterproof coating is coming off in strips.
I am thinking about peeling off as much of this coating as possible, and then giving the uncovered portions the sil-nylon treatment. I don't expect to get perfect results, but I've nothing to lose but the cost the materials and a little time.
Anyone have any thoughts or comments? I have a nagging feeling that there's something about this project I don't know that is about to bite me.