I went to Wal Mart because that was the original question in this thread. I’m not adverse to trying new things. In the old days (50’s) we used whatever nylon we could find. I remember one model arrived at the field with a black fuselage and roses all over the wings. However I’ve just finished the structure for a Hog Bipe, and saving a few dollars by experimenting with a look alike dress fabric just isn’t worth the risk. I’ve been fooled before by stuff that looked good, but didn’t work as well. When you look at potential savings of maybe $10 on a project that costs about $400, it doesn’t make much sense.