You'll never again think all shoe polish is the same, thanks to this great print ad from Euro RSCG Buenos Aires, provided by Adland. This is a great example of evolving a commoditized product to a differentiated brand by applying over-the-top positioning to the brand's key equity (shininess), a feature that is pretty much the same across competing products.
This strategy won't work for every brand, but it works so well here that we're anointing "Extra Bright" shoe polish our Brand of the Week.