On: The Water-Repelling Surface That Lives Outside My Window

[CapitalistCartr]

You can buy Rain-X and the like at auto parts stores.

[yellowapple → CapitalistCartr]

Plus there's that NeverWet stuff Rustoleum sells now; according to their marketing materials, it actually qualifies as superhydrophobic (i.e. in the same ballpark as the article's leaf): http://www.neverwet.com/product-characteristics.php

[joezydeco → CapitalistCartr]

There's stronger stuff, like Diamon-Fusion, but they all wear away with use.

[serf → joezydeco]

that seems as if it'd be true for any surface that makes use of the three dimensional shape/properties of the surface.