I've thought about trying this on my topsheet for my splits. Hoping that it would keep the snow from collecting on my skis while skinning. There are times that scenario adds pounds which sucks. Might have to give it go.
Sounds like a good idea, but remember, they don't recommend using it on glass or clear surfaces as it leaves them cloudy. I'm wondering if that would do the same thing with the clear urethane on a top sheet? I'm sure you've considered this but you might want to test it on similar surface first.
I was also wondering about the "breathability" of fabric after application of the product. I didn't see that addressed anywhere in the vid. My guess
would be that it probably would affect it somehow. (...but that's just a guess!)