It'll work fine! Just remember not to cover your barometer and microphone! When I fly in the snow, I bring an air compressor with me to blow the snow off the quad and motors after a crash! Snow won't hurt the motors. Motors will work underwater! But, you still have to blow the snow out of the motors so they don't freeze!
So is the best conformal coating MG Chemicals 422C? Looking to winter/waterproof and heard the conformal coating also adds helps a little with crashes?