I'm looking for recommendations for a car cover that I can use for my car which is parked outdoors. I'm looking at the Supercheap options here: https://goo.gl/Y9gB2S Anyone ever use these? If not these, any suggestions on something that'll be waterproof, won't blow away, and will protect my car for weeks at a time when it isn't driven and birds are trying to crap all over it? Thanks!