Well, I sprayed them with several layers of acrylic varnish, so I hope they will be able to withstand some rain, but I highly doubt it. The glue used is water soluble so if it rains and they get wet they might potentially start coming apart.
I'm still trying to waterproof them because I spent so long on these wings that I don't want to lose them if it rains at the event I plan on wearing them at.
I spent the better part of yesterday waterproofing my wings with waterproofing spray for tents. It rains a lot here too and I don't want to lose the wings after like 10 minutes if it does rain, and so ar it seems to be working. Some brands leave stains though, and others make the feathers fall apart, so trial and error.... I tried it on some spare feathers